Sexual Incentive Motivation and Sexual Behavior: The Role of Consent.

The generalized social concern with sexual harassment and nonconsensual sex makes it imperative to incorporate notions of consent in any analysis of human sexual interactions. Such interactions follow an ordered sequence of events, starting with the perception of a sexual incentive, followed by an approach to it, genital interaction, and eventually orgasm. Consent from the partner is needed at every stage. At some points in this chain of events, the individuals involved make cognitive evaluations of the context and predictions of the likelihood for obtaining consent for proceeding to the next phase. Processes such as communication of consent or lack thereof, sexual decision making, and interpretation of cues emitted by the partner are decisive. Increased sexual motivation may influence these processes. However, available data make it possible to ascertain that enhanced motivation has no, or at most minor, effects, thereby invalidating the old assumption that heightened sexual motivation leads to impaired control.

Ovulatory cycle shifts in human motivational prioritisation of sex and food.

Previous research on the endogenous effects of ovarian hormones on motivational states in women has focused on sexual motivation. The Motivational Priority Shifts Hypothesis has a broader scope. It predicts a shift from somatic to reproductive motivation when fertile. In a highly powered preregistered online diary study across 40 days, we tested whether 390 women report such an ovulatory shift in sexual and eating motivation and behaviour. We compared 209 naturally cycling women to 181 women taking hormonal contraceptives (HC) to rule out non-ovulatory changes across the cycle as confounders. We found robust ovulatory decreases in food intake and increases in general sexual desire, in-pair sexual desire and initiation of dyadic sexual behaviour. Extra-pair sexual desire increased mid-cycle, but the effect did not differ significantly in HC women, questioning an ovulatory effect. Descriptively, solitary sexual desire and behaviour, dyadic sexual behaviour, appetite, and satiety showed expected mid-cycle changes that were diminished in HC women, but these failed to reach our strict preregistered significance level. Our results provide insight into current theoretical debates about ovulatory cycle shifts while calling for future research to determine motivational mechanisms behind ovulatory changes in food intake and considering romantic partners' motivational states to explain the occurrence of dyadic sexual behaviour.

Motivation When Desire Is Low: Associations Between Sexual Motivation and Sexual Intimacy, Sexual Satisfaction, and Sexual Distress for Men with Hypoactive Sexual Desire Disorder and Their Partners.

Hypoactive sexual desire disorder (HSDD) in men, characterized by chronically low sexual desire, is associated with poor sexual well-being, such as lower sexual satisfaction and higher sexual distress. Additionally, despite their low desire, men with HSDD often report wanting sexual intimacy and validation within their sexual lives/relationships. Studies that apply self-determination theory to sexual relationships demonstrate that adopting more autonomous (e.g., engaging in sex for its inherent pleasure) and less controlled (e.g., engaging in sex for some external reward or consequence) motives for engaging in sex is associated with greater sexual well-being for both members of the couple. Given that autonomous motivation in relationships is associated with intimacy and sexual satisfaction, and lower sexual distress, having sex for autonomous reasons may allow men with HSDD and their partners to feel more sexually intimate despite their lower sexual desire, whereas having sex for controlled reasons may hinder sexual intimacy and satisfaction and augment sexual distress. In this dyadic cross-sectional study, we examined the associations between types of sexual motivation and sexual intimacy, sexual satisfaction, and sexual distress for men with HSDD and their partners (n = 64 couples). Men with HSDD who reported having sex for more autonomous reasons reported more sexual satisfaction and both partners reported more sexual intimacy. Men with HSDD who had sex for more controlled reasons had partners who felt less sexual intimacy and satisfaction, and both partners were more sexually distressed. Promoting autonomous sexual motivation and decreasing controlled motivation may help couples navigating HSDD to feel closer in their relationship, more sexually satisfied, and less sexually distressed.

[Compulsive Sexual Behaviour Disorder and Sexual Motivations]. / A kompulzív szexuális viselkedési zavar és a szexuális motivációk összefüggései.

INTRODUCTION: Compulsive sexual behaviour or hypersexuality has been the subject of growing interest among academic circles. However, relatively few reliable predictors have been identified. The aim of the present study was to examine whether different types of sexual motivations based on Self-Determination Theory can account for compulsive sexual behaviour. METHOD: The study was conducted on a non-clinical sample of nearly 1000 participants. Sexual motivation was assessed using the Sexual Motivation Scale and compulsive sexual behaviour was assessed using the Hypersexual Behaviour Inventory. Both measures showed adequate reliability. Multiple linear regression was performed to analyse the relationship between the variables. RESULTS: In the regression, controlling for gender, of the six motivational factors, integrated (ß = 0.167), introjected (ß = 0.074) and amotivation (ß = 0.128) were found significant (p <0.001), and identified was nearly significant (ß = 0.53; p = 0.065). The intrinsic (ß = -0.032; p = 0.366) and extrinsic (ß = -0.027; p = 0.168) forms of motivation had no impact on hypersexuality. The total explained variance of the model was 18% (p <0.001). Results indicated that three of the six motivational factors positively and weakly predicted hypersexuality. CONCLUSION: The original hypothesis of the study, that less self-determined motivated sexual behaviour would be a better predictor of compulsive sexual behaviour, was not confirmed. In practice, positively related variables, especially amotivation, may play an important role in psychotherapeutic processes. However, in order to better understand compulsive sexual behaviour, additional factors still need to be explored.

The Effects of Chronic Asprosin Administration on Sense of Smell and Sexual Behavior in Female Rats.

INTRODUCTION: Asprosin is an adipokine released from white adipose tissue during fasting and acts through the olfactory receptor. It is known that adipokines play roles in reproductive physiology in mammals. However, there are very few studies conducted on role of asprosin in reproductive functions. There are no studies on its relationship with sexual motivation. It was shown in the literature that administration of asprosin to male mice improves olfaction. It is also known that there is a strong correlation between smell and sexual desire. In view of this, it was hypothesized that chronic administration of asprosin would improve olfactory performance and increase sexual incentive motivation in female rats for male partners. METHODS: This hypothesis was tested by applying the hidden cookie test, sexual incentive test, active research test, and sexual behavior test. The changes in serum hormone levels in female rats that chronically received asprosin were also measured and compared. RESULTS: Chronic asprosin exposure increased olfactory performance, male preference ratio, male investigation preference ratio, activity index, and anogenital investigation behavior. Also, serum oxytocin and estradiol levels increased following chronic administration of asprosin in female rats. CONCLUSION: These data suggest that chronic administration of asprosin can result in increased sexual incentive motivation for opposite sex in female rats over increased olfactory performance and changes in reproductive hormones.

Sexual Motivations Underlying Compulsive Sexual Behavior in Women and Men From Germany and Hungary.

BACKGROUND: There are ongoing debates about conflicting models on how to conceptualize compulsive sexual behavior. At the heart of these discussions is the question about the sexual motivations underlying compulsive sexual behavior, as different models assume different motivations. AIM: The aim of the present study was to understand sexual motivations underlying compulsive sexual behavior and their relation to the most prominent conceptualizations of compulsive sexual behavior (eg, compulsive sexual behavior disorder [CSBD], sex addiction). METHODS: We used self-reported data from 2 large samples of Hungarian and German populations (N = 9814). The Sexual Motivation Scale (SexMS), a 24-item self-report measure based on self-determination theory, was used to assess a diverse set of sexual motivations. Compulsive sexual behavior was assessed with the 19-item Compulsive Sexual Behavior Disorder Scale (CSBD-19), that is based on the ICD-11 diagnostic guidelines of CSBD. We used structural equation modeling to examine the hypothesized associations between sexual motivations and compulsive sexual behavior and examined potential gender differences in these associations. OUTCOMES: Compulsive sexual behavior was assessed in relation to a set of sexual motivations. RESULTS: Amotivation had the strongest positive association with compulsive sexual behavior, but integrated, introjected, and intrinsic motivations were also positively related to it. Importantly, these associations did not differ for women and men, and between the 2 samples. CLINICAL IMPLICATIONS: Future research and treatment should also consider sexual motivations that are not listed among the ICD-11 guidelines for CSBD, including high levels of sexual interest, continuing the behavior despite having little satisfaction from it and coping with sex. STRENGTHS & LIMITATIONS: Although we used large samples of general populations in 2 Western countries, this motivational background of compulsive sexual behavior awaits replication in a clinical sample of individuals experiencing CSBD. CONCLUSION: The identified sexual motivations underlying compulsive sexual behavior are relevant for assessing and treating patients as motivations may be integrated into psychotherapeutic interventions. Koós M, Fuss J, Klein V, et al. Sexual Motivations Underlying Compulsive Sexual Behavior in Women and Men From Germany and Hungary. J Sex Med 2022;19:170-181.

Why Hungarians Have Sex: Development and Validation of a Brief 15-Item Instrument (YSEX?-15H).

The present study developed a brief version of the Hungarian Why Sex? questionnaire (Meskó et al., 2022). The study was in part based on previously reported data obtained from several samples (N = 6193; 1976 men, 4217 women). Using Mokken Scaling Procedure, Item Response Model and redundancy analysis indicated that retaining three summary scales comprising five items each was the optimal solution for the brief version. The validity of the brief scale was tested with the Sexual System Functioning Scale (SSFS), the Experiences in Close Relationships Scale-Short Form (ECR-S) and, the Hungarian version of the Attachment Style Questionnaire (ASQ-H; n = 297, 127 men, 170 women). In addition, correlations between the long and brief versions of YSEX? with sociosexual orientation (SOI-R) and the five-factor personality construct (BFI-S) were compared (n = 1024, 578 women, 446 men). The results suggest that the three summary scales of the Hungarian 15-item Form of the Why Sex Questionnaire (YSEX?-15H) provide reliable and valid measures of the previously affirmed three broad sexual motives (Personal Goal Attainment, Relational Reasons, Sex as Coping). The Relational Reasons summary scale was associated with secure emotional and sexual attachment. The Personal Goal Attainment and Sex as Coping summary scales showed coherent patterns of associations with the emotional and sexual aspects of secondary attachment strategies (over- and under-functioning). The YSEX?-15H offers both researchers and practitioners a concise and useful instrument for the assessment of sexual motivation.

The Relation of Mood and Sexual Desire: An Experience Sampling Perspective on the Dual Control Model.

We investigated the effect of fluctuations in negative and positive affect on momentary sexual motivation in a sample of women and men in a steady relationship (n = 133). Sexual motivation was regarded as the aggregate of sexual desire, subjective sexual arousal and openness to sexual contact. Experience sampling methodology was used to collect up to 70 measurements per participant over a period of seven consecutive days of sexual motivation, and negative and positive affect. Using multilevel analysis, we investigated cross-level interactions between affect and trait measures as specified in the dual control model (DCM). This model postulates sexually excitatory and inhibitory mechanisms as relatively independent systems that together can explain individual differences in sexual motivation and behavior. Results implicated that any intensification of feelings, positive or negative, was associated with a momentary increase in sexual motivation for participants more prone to sexual excitation. In the lagged analysis, higher preceding negative affect, measured 1-2 h earlier, forecasted an increase in current sexual motivation for participants more prone to sexual excitation. The lagged analysis included the autoregressive effect or inertia of sexual motivation. Inertia reflects the extent to which sexual motivation lingers and persists at similar levels. Our findings showed that sexual motivation levels persisted less in individuals with higher sexual inhibition proneness due to threat of performance failure. This study demonstrated how experience sampling methodology can be used to extend research on associations between mood and sexual motivation and implicates that DCM factors moderate these associations.

Menstrual Cycle Changes in Daily Sexual Motivation and Behavior Among Sexually Diverse Cisgender Women.

We used a one-month daily diary assessment to measure menstrual cycle-related changes in same-gender and other-gender sexual motivation and behavior in 148 cisgender women (32% lesbian-identified, 35% bisexually identified, and 33% heterosexual-identified). Women with exclusive same-gender orientations reported increased motivation for same-gender sexual contact during the higher-fertility phase of the cycle, but women with exclusive other-gender orientations did not show a parallel increase in other-gender sexual motivation during the higher-fertility phase. Bisexually attracted women showed no phase-related changes in same-gender or other-gender sexual motivation, regardless of whether they generally preferred one gender versus the other. Rates of partnered sexual contact did not increase during the higher-fertility phase. During the 14 midcycle days during which we assayed salivary estrogen and testosterone, we found no significant associations between daily hormones and sexual motivation. However, daily estrogen levels were positively related to sexual behavior among women currently partnered with women, and negatively related to sexual behavior among women currently partnered with men. Our results suggest that traditional evolutionary models of menstrual cycle-related changes in sexual motivation do not adequately reflect the full range of cycle-related changes observed among sexually diverse women.

Perceived Changes in Sexual Interest and Distress About Discrepant Sexual Interest During the First Phase of COVID-19 Pandemic: A Multi-Country Assessment in Cohabiting Partnered Individuals.

Due to COVID-19 pandemic, different restrictive measures in terms of physical distancing and lockdowns have been introduced in most European countries, affecting all facets of social life. Currently, little is known about how partnered individuals perceive changes in their sexual life during this complex emergency. This study explored retrospectively assessed changes in sexual interest for one's partner and levels of distress related to perceived sexual interest discrepancy during the first phase of the pandemic in a large-scale online sample of partnered individuals (n = 4813; Mage = 38.5 years, SD = 10.74) recruited between May and July 2020 in seven European Union countries and Turkey. We also examined the possible role of approach/avoidance motives for sex in reported changes in sexual interest and associated distress. Most participants (53%) reported no change in their sexual interest during the pandemic, followed by those who reported an increase (28.5%). The pattern was similar across the eight countries. Distress about discrepant sexual interest, which was only weakly related to changes in sexual interest, was significantly associated with relationship quality and emotional closeness with a partner, coping with and worrying about the pandemic, and specific motivation for sex. In contrast to avoidant and relationship-focused approach motivation, ego-focused approach motivation was related to stable sexual interest during the pandemic. The current study contributes to the understanding of the link between sexual interest and complex emergencies. Considering that the COVID-19 pandemic continues, the reported experiences and perceptions are prone to change.

Why Hungarians Have Sex (YSEX?-HSF).

Using the same methodology as Meston and Buss (2007), three studies were conducted on a Hungarian sample (total N = 4913) which corroborate previous findings on the universal diversity of sexual motivation. Study 1 (N = 2728; 1069 women and 1659 men) identified 197 reasons for having sex based on participants' free responses. In Study 2 (N = 1161; 820 women and 341 men), participants indicated the extent to which each of the 197 reasons had led them to have sexual intercourse. Factor analyses yielded three factors and 24 subfactors. This differed from the original YSEX? four-factor questionnaire. In Study 3 (N = 1024; 578 women and 446 men), a reliable and valid 73-item short form version of the YSEX? questionnaire was developed in a Hungarian sample (YSEX?-HSF). In addition to similarities and differences in the factor structure, we found important links between reasons for having sex and age, gender, personality, and mating strategy. For example, number of reasons for having sex tended be higher in younger compared to older participants. Men exceeded women on having sex for novelty-seeking and infidelity opportunities, whereas women exceeded men on having sex for relationship commitment and mate retention. Extraversion and neuroticism were linked with reasons for having sex, and those who pursued a short-term mating strategy reported having sex for a larger variety of reasons.

Reduced sexual motivation of diabetic female rats: Restoration with insulin.

The aim of this study was to evaluate female rat sexual motivation in a model of diabetes mellitus type 1. Severe hyperglycemia was induced in ovariectomized Wistar rats by injecting streptozotocin [STZ, 100 mg/kg, i.p.]. Ten days later, females received estradiol benzoate (10 µg/rat, s.c.) plus progesterone (3 mg/rat, s.c.). A group of STZ-treated animals was administered with insulin (2-4 U) every 12 h for 10 days, which normalized glucose levels. In the partner preference (PP) and sexual incentive motivation (SIM) tests, control females spent more time close to a sexually experienced male (SE) than with a castrated male (CM). STZ-treated females stayed the same amount of time with both stimuli, that is, they lost their sexual preference. We also evaluated the sense of smell using two behavioral tests, one related to sexual odors (SO) and another one to food odors (FO). In the SO test, control females spent more time sniffing the sawdust coming from cages that contained SE males; hyperglycemic females remained the same amount of time sniffing the sawdust of both stimuli: SE and CM. In the FO test, no differences were found between control and STZ-treated groups. Insulin treatment reverted the changes observed in hyperglycemic females in the PP, SIM and SO tests. These data suggest that severe hyperglycemia decreases sexual motivation and that insulin recovers such diminution.

Daily GnRH agonist treatment delays the development of reproductive physiology and behavior in male rats.

The present study was designed to examine the effects of suppressing pubertal onset with leuprolide acetate, a gonadotropin releasing hormone (GnRH) agonist. Starting on postnatal day (PD) 25, male Long-Evans rats were injected daily with either leuprolide acetate (25 µg/kg dissolved in 0.9% sterile physiological saline; n = 13) or sterile physiological saline (1.0 ml/kg 0.9% NaCl; n = 14) for a total of 25 days. Males were monitored daily for signs of puberty (i.e., preputial separation). On the last day of leuprolide treatment (PD 50), half of each treatment group was injected with 10.0 µg of estradiol benzoate (EB) daily for three consecutive days (PD 50-52) and 1.0 mg of progesterone (P) on the 4th day (PD 53), whereas the other half of each treatment group received oil injections. Four hours after P injections, all subjects were given the opportunity to interact with a gonadally-intact male and a sexually receptive female rat (i.e., a partner-preference test with and without physical contact). Copulatory behavior and sexual motivation were measured. Hormone injections and mating tests were repeated weekly for a total of 3 consecutive weeks. Results showed that leuprolide delayed puberty as well as the development of copulatory behavior and the expression of sexual motivation. By the last test, the leuprolide-treated subjects showed signs of catching up, however, many continued to be delayed. Estradiol and progesterone mildly feminized male physiology (e.g., decreased testes weight and serum testosterone) and behavior (e.g., increased lordosis), but did not interact with leuprolide treatment.

Olfaction Is Associated With Sexual Motivation and Satisfaction in Older Men and Women.

BACKGROUND: Sensory function declines with age and may impact sexual function in older adults. Indeed, the sense of smell plays a uniquely strong role in sexual motivation. Therefore, olfactory dysfunction in older adults may be intimately linked to changes in sexual desire and satisfaction. AIM: To test whether impaired olfactory function is associated with decreased sexual activity and motivation in older adults. METHODS: Cross-sectional analysis of a nationally representative sample of community-dwelling older U.S. adults from the National Social Life, Health, and Aging Project. OUTCOMES: 2 modalities of olfactory function were measured (sensitivity to n-butanol and odor identification) via validated methods (Sniffin' Sticks). Respondents answered survey questions about frequency of sexual thoughts (motivation) and sexual activity, and satisfaction with their most recent sexual relationship. A wide range of demographic, health, and social information were also collected. RESULTS: Decreased olfactory function in older U.S. adults was associated with decreased sexual motivation (odds ratio 0.93, P = .03) and less emotional satisfaction with sex (odds ratio 0.89, P = .04), but not decreased frequency of sexual activity or physical pleasure, in analyses that were adjusted for age, gender, race, education, cognition, comorbidities, and depression. CLINICAL IMPLICATIONS: Olfactory dysfunction may affect sexuality in older adults. Potentially treatable causes of sensory loss should be addressed by clinicians to improve quality of life. STRENGTHS & LIMITATIONS: These results rely on validated olfactory testing, detailed measures of sexual attitudes and behaviors, and extensive demographic, health, and social history in a nationally representative sample of older U.S. adults. Owing to the cross-sectional nature of these analyses, we cannot determine causality. CONCLUSIONS: Olfactory dysfunction in older U.S. adults is associated with decreased sexual motivation and emotional satisfaction, potentially due to evolutionarily-conserved neurological links between olfaction and sexuality. Siegel JK, Kung SY, Wroblewski KE, et al. Olfaction Is Associated With Sexual Motivation and Satisfaction in Older Men and Women. J Sex Med 2021;18:295-302.

The Impact of Psychosis on Sexual Functioning: A Systematic Review.

BACKGROUND: Sexual dysfunction among psychotic patients is highly prevalent. However, most research has focused on antipsychotic side effects on sexual functioning. AIM: To provide evidence by means of a systematic review of the literature about the impact of psychosis on sexual functioning among unmedicated patients. METHODS: Systematic search of MEDLINE (PubMed), Scopus, and Google Scholar for studies that reported sexual functioning among psychotic patients, who were drug-naïve or drug-free for at least 3 weeks before the study. Studies were published in English language between January 1994 and October 2019. We used the approach recommended by PRISMA, and the selection process was carried out by 2 reviewers. OUTCOMES: The outcome measures were sexual function and sexual dysfunctions. RESULTS: A total of 734 articles were obtained, 658 were obtained after duplicates were removed, 612 were excluded after reading the title and abstract, and 46 were included for a complete review of the articles. 5 papers were finally included. A total of 770 cases were included in the systematic review. The prevalence of sexual dysfunction in psychosis varied from 16.8% to 70% and in ultra-high state was 50%. It is noteworthy that those ultra-high-risk (prodromal) patients who develop psychosis had higher rates of sexual impairment. Therefore, we found higher rates of sexual dysfunction among untreated patients, both psychotic and ultra-high risk patients, than healthy controls. CLINICAL IMPLICATIONS: The assessment of sexual behavior should be a part of routine psychiatric examination not only in psychotic but also in ultra-high-risk patients. STRENGTHS & LIMITATIONS: This is the first systematic review about the impact of psychosis on sexual functioning among unmedicated patients. However, scarce and heterogeneous studies were identified. CONCLUSIONS: Impaired sexual functioning is common in the onset of psychosis (or during ultra-high-risk state) and prior to the beginning of treatment. This suggests that psychotic symptoms and sexual dysfunction may have common etiological pathways at the psychosocial and neurobiological levels. Vargas-Cáceres S, Cera N, Nobre P, et al. The Impact of Psychosis on Sexual Functioning: A Systematic Review. J Sex Med 2021;18:457-466.

Sexual Motivation and Sexual Reward in Male Rats are Attenuated by the Gonadotropin-Releasing Hormone Receptor Antagonist Degarelix.

BACKGROUND: Preclinical studies that have examined the effects of androgen deprivation therapies (ADTs) on sexual outcomes have either relied on a surgical castration model of ADTs or have largely focused on consummatory sexual behaviors. AIM: The aim of this study was to examine the effects of a single administration of the gonadotropin-releasing hormone receptor antagonist, degarelix, on sexual incentive motivation (SIM), sexual reward, consummatory sexual behaviors, anxiety-like behavior, and androgen receptor signaling in male rats, and to determine if sexual stimulation attenuates the effects of degarelix on SIM. METHODS: Male rats were treated with degarelix, or vehicle, and half of the rats in each condition were briefly exposed to a sexually receptive female immediately before SIM trials (experiment 1). Rats treated with degarelix or vehicle were also given a sex-conditioned place preference test (experiment 2A), weekly mating tests (experiment 2B), and an elevated zero maze test (experiment 3). Androgen-sensitive tissues were excised upon completion of testing. OUTCOMES: SIM was indicated by the percentage of time spent near a sexually receptive female on the SIM tests. The percentage of time spent in the chamber of a conditioned place preference maze associated with sexual experience was indicative of sexual reward. The percentage of trials in which a mount, intromission, and ejaculation occurred was indicative of copulatory ability. Sexual performance was characterized by the average latencies to first exhibit these behaviors, as well as the average frequency of these behaviors. Anxiety-like behavior was indicated by the percentage of time in the open zones of an elevated zero maze. Relative weights of the seminal vesicles and bulbourethral glands were used to quantify androgen activity. RESULTS: Rats treated with degarelix exhibited lower levels of SIM. In rats treated with degarelix, contact with a female immediately before SIM testing increased activity, but not SIM. Treatment with degarelix reduced the rewarding aspects of sexual behavior, as well as most aspects of copulatory ability and sexual performance. Degarelix treatment reduced androgen signaling, but did not impact anxiety-like behavior. CLINICAL IMPLICATIONS: The behavioral side effects associated with the use of degarelix may be restricted to sexual behaviors. STRENGTHS & LIMITATIONS: Strengths include the objective measurement of sexual behaviors. The study is limited in that only one ADT was examined. CONCLUSION: These findings serve as an extension of previous preclinical studies as they indicate that gonadotropin-releasing hormone receptor antagonism in male rats also attenuates sexual motivation and sexual reward, in addition to copulatory ability and sexual performance. Hawley WR, Kapp LE, Green PA, et al. Sexual Motivation and Reward in Male Rats are Attenuated by the Gonadotropin-Releasing Hormone Receptor Antagonist Degarelix. J Sex Med 2021;18:240-255.

Motivations for Engaging in Consensually Non-Monogamous Relationships.

Sexual, romantic, and intimate relationships provide opportunities for individual and interpersonal fulfillment and the enhancement of well-being. Though research has identified that consensual non-monogamy (CNM) offers unique relational benefits, little work has examined why individuals pursue CNM relationships. Both self-determination theory and self-expansion theory provide frameworks for understanding the range of intra- and interpersonal motives for choosing or negotiating a multipartnered relationship. We explored the reasons for which people engage in CNM and discuss how motivations for CNM might be linked to well-being and need fulfillment. Our study used a qualitative approach to examine the motivations individuals report for engaging in CNM relationships. As part of a larger online survey, participants completed open-ended questions examining motivations for, and experiences of, CNM relationships. Data from participants who indicated that they were currently in a CNM partnership was selected for the analyses (n = 540). Data were analyzed using thematic analysis, within a critical realist framework. Motivations were organized into six interconnected themes: reasons related to autonomy, beliefs and value systems, relationality, sexuality, growth and expansion, and pragmatism. Individuals reported diverse reasons for engaging in CNM relationships; reasons addressed both individual and relational needs and well-being. Findings contrast with stereotypic views of CNM relationships as unstable/unfulfilling or that individuals engage in CNM because of relationship problems. The findings may facilitate therapeutic interventions for counselors working with individuals who are in the process of negotiating or re-negotiating relationship boundaries.

Increase in sexual motivation throughout adolescence in the cycling female rat.

Sexual behavior in the female rat is a highly motivated behavior first displayed during adolescence, a developmental period when neural circuits underlying motivation are not mature. This study characterizes the natural development of sexual motivation and behavior of female rats. We compared the incentive value of the male for mid-adolescent (PNDs:39-43), late adolescent (PNDs:49-53), and adult (PNDs:90-115) cycling females, using a male-female preference task and an ultrasonic vocalization emission test following exposure to a male or female stimulus animal. Furthermore, display of sexual and social behaviors during an interaction with a male or a nonreceptive female was assessed. Mid-adolescent rats exhibited a reduced preference for the male than adults and performed less attempts to access the male. Unlike late adolescent and adult females, mid-adolescent rats did not increase their ultrasonic vocalization emission after interacting with a male relative to a female. Although most of the sexual behavior did not differ between groups, mid-adolescent females showed lower lordosis magnitude and higher levels of play and social investigation during a sexual interaction, giving rise to a unique behavioral profile. Present results indicate that the sexual behavior repertoire is fully displayed by mid-adolescence, but sexual motivation is low and increases into late adolescence.

Sexual homicide in Australia and New Zealand: a description of offenders, offences and victims.

The field of sexual homicide research is relatively recent, with many existing studies limited by small sample sizes and sampling bias. In Australia and New Zealand specifically, only one study to date addresses this phenomenon but there is a lack of comprehensive descriptive data. This study aims to fill this research gap using a representative sample gathered from public legal databases. A total of 118 cases of sexual homicide offenders are described to create a portrait of this type of offender, their victims and their offence behaviour. Findings are similar to those found in other large samples from the UK, Canada and Germany. Because this crime is rare and practitioners tend to have limited experience of them, the findings of this research have the potential to inform investigative, criminal justice and clinical practice.

Sexual behavior in rodents: Where do we go from here?

Hormones and Behavior was first published 50 years ago including some articles related to the hormonal regulation of sexual behavior in different species. Since then, this research field has produced outstanding discoveries that have contributed to our understanding of the control of sexual behavior. The refinement of classical techniques and the development of new experimental tools has opened the door to a new era of research that will allow us to understand different aspects of sexual behavior. It would also expand the possible extrapolation from animal models to understand human sexuality and its dysfunctions. In this review, we summarize some of the most recent findings about sexual behavior in both sexes including the refinement of classical methods of study with new approaches and questions as well as the development of new methods trying to explain mechanisms of action on motivational and consummatory elements of mating behavior. We also reviewed other aspects that modulate sexual behavior such as attractivity, olfactory signals and learning which model mate selection. Additionally, we described studies demonstrating that sexual behavior induces permanent brain modifications in neuronal circuits. Finally, we briefly describe recent contributions on animal models of human sexuality dysfunctions which, although with their own limitations, are under continuous refining.