scholarly journals Sexual unfaithfulness can be judged with some accuracy from men's but not women's faces

2019 ◽  
Vol 6 (4) ◽  
pp. 181552 ◽  
Author(s):  
Yong Zhi Foo ◽  
Antonina Loncarevic ◽  
Leigh W. Simmons ◽  
Clare A. M. Sutherland ◽  
Gillian Rhodes
Keyword(s):  
Biological Significance ◽  
Mate Guarding ◽  
Mating Strategies ◽  
Reproductive Costs ◽  
Same Sex ◽  
Short Term ◽  
Men And Women ◽  
Facial Masculinity ◽  
Opposite Sex

We routinely make judgements of trustworthiness from the faces of others. However, the accuracy of such judgements remains contentious. An important context for trustworthiness judgements is sexual unfaithfulness. Accuracy in sexual unfaithfulness judgements may be adaptive for avoiding reproductive costs associated with having an unfaithful partner. Indeed, emerging studies suggest that women, and to a lesser degree, men, show above-chance accuracy in judging sexual unfaithfulness from opposite-sex faces. In the context of mate guarding, it is important not only to assess the likelihood of a partner defecting, but also to detect same-sex poachers. Therefore, here, we examine whether individuals can also judge sexual unfaithfulness (self-reported cheating and poaching behaviour) from same-sex faces. We found above-chance accuracy in judgements of unfaithfulness from same-sex faces in men but not women. Conversely, we found above-chance accuracy for opposite-sex faces in women but not men. Therefore, both men and women showed above-chance accuracy, but only for men's, and not women's, faces. Raters were making accurate (above-chance) judgements of unfaithfulness from men's faces using facial masculinity, a well-established signal of propensity to adopt short-term mating strategies. In summary, we found above-chance accuracy in impressions of unfaithfulness from men's faces. Although very modest, the level of accuracy could nevertheless have biological significance as an evolved adaptation for identifying potential cheaters/poachers.

The Evolution of Same-Sex Attraction in Women

2019 ◽  
Vol 40 (2) ◽  
pp. 104-110 ◽  
Author(s):  
Menelaos Apostolou
Keyword(s):  
Strong Support ◽  
Considerable Proportion ◽  
Heterosexual Men ◽  
High Tolerance ◽  
Same Sex ◽  
Short Term ◽  
Men And Women ◽  
Sex Attraction ◽  
Opposite Sex

Abstract. A considerable proportion of the population experiences varying degrees of same-sex attraction. It has been proposed that men exhibit high tolerance to their partner’s same-sex infidelity, which allows such predispositions to exist in a relative high frequency in the population. On this basis, the hypothesis was tested that heterosexual men and women would differ in their tolerance level, with men exhibiting higher tolerance to same-sex infidelity than women. Evidence from an online sample of 590 heterosexual Greek-speaking participants provided strong support for this hypothesis. In particular, the vast majority of women exhibited low tolerance, while about one in two men exhibited high tolerance to same-sex infidelity. Furthermore, men and women exhibited higher tolerance to the same-sex infidelity of their long-term than of their short-term partners, with men exhibiting higher tolerance in the latter case. In addition, women exhibited low tolerance to opposite-sex and same-sex infidelity, but men exhibited low tolerance to opposite-sex infidelity, but much higher tolerance to same-sex infidelity.

scholarly journals Male Tolerance to Same-Sex Infidelity: A Cross-Cultural Investigation

2019 ◽  
Vol 17 (2) ◽  
pp. 147470491984389
Author(s):  
Yan Wang ◽  
Menelaos Apostolou
Keyword(s):  
Cross Cultural ◽  
Heterosexual Men ◽  
Same Sex ◽  
Short Term ◽  
Men And Women ◽  
Cultural Contexts ◽  
Sex Attraction ◽  
Female Partners ◽  
Opposite Sex

There is accumulating evidence that heterosexual men exhibit tolerance to their partners’ same-sex infidelity. The current study examined such tolerance in the Chinese ( N = 949) and the British ( N = 305) cultural contexts. Consistent with the predictions derived from an evolutionary framework, across different cultural settings, men exhibited higher tolerance than women to their partners’ same-sex infidelity. In addition, if they had to choose, men were considerably more likely than women to prefer their partners to cheat with an individual of the same than of the opposite sex. Participants were also more tolerant of infidelity involving their short-term than their long-term partners. Moreover, men who preferred same-sex attraction in women were more tolerant to the same-sex infidelity of their female partners than men who did not share these preferences. Finally, men and women who experienced same-sex attractions indicated higher tolerance to infidelity. The implications of these finding for the evolution of same-sex attraction in women were further discussed.

Effects of Sex and Sex Roles on Avoidance of Same- and Opposite-Sex Touch

1994 ◽  
Vol 79 (1) ◽  
pp. 107-112 ◽  
Author(s):  
C. B. Crawford
Keyword(s):  
Undergraduate Students ◽  
Predictive Models ◽  
Sex Roles ◽  
Interpersonal Relations ◽  
Interactive Effect ◽  
Same Sex ◽  
Men And Women ◽  
Touch Avoidance ◽  
Opposite Sex ◽  
The Relationship

Touch and touch avoidance are important facets of interpersonal relations. Touch avoidance has been related to sex, but the relationship between touch and sex roles has not been widely substantiated. 259 undergraduate students participated in a procedure designed to test the relationship between sex, sex roles, and same-sex and opposite-sex touch avoidance. Significant differences were reported between men and women on same-sex touch avoidance but not on opposite-sex touch avoidance. Participants high on androgyny reported less same-sex and opposite-sex touch avoidance than did subjects low on androgyny. No interactive effect between sex and androgyny was found for either same-sex or opposite-sex touch avoidance. Regression procedures indicated predictive models for sex and androgyny in relation to same-sex and opposite-sex touch avoidance. Specific conclusions regarding the relationships among sex, androgyny, and touch avoidance were stated.

Mediation and moderation in ratings of hostile jokes by men and women

2012 ◽  
Vol 25 (1) ◽  
Author(s):  
Millicent H. Abel ◽  
Jason Flick
Keyword(s):  
Sex Differences ◽  
Same Sex ◽  
Mediation Effects ◽  
Men And Women ◽  
Moderation Effect ◽  
Moderation Effects ◽  
Masculinity And Femininity ◽  
Opposite Sex ◽  
Mediation And Moderation

AbstractTwo studies were conducted to examine sex differences in enjoyment of hostile jokes targeting men and women with a focus on examining mediation effects of masculinity and femininity and moderation effects of the jokes' offensiveness. These studies continued to support men and women enjoying jokes targeting the opposite sex more so than jokes targeting the same sex. However, in Study 1, masculinity and femininity mediated these differences for men with higher masculinity related to greater enjoyment of the female hostile jokes and higher femininity related to greater enjoyment of the male hostile jokes. Masculinity alone mediated the differences for women with higher masculinity related to greater enjoyment of the female-targeted jokes and yet, no relationship existed with femininity. In Study 2, both men and women rated the female-targeted jokes as more offensive than the male-targeted jokes. A moderation effect for the jokes' offensiveness occurred for women who rated highly offensive male-targeted jokes funnier than highly offensive female-targeted jokes. No effect for offensiveness occurred for men; men rated both offensive female-targeted and male-targeted jokes equally funny even though they rated the female jokes as more offensive.

scholarly journals Cross-cousin marriage among the Yanomamö shows evidence of parent–offspring conflict and mate competition between brothers

2017 ◽  
Vol 114 (13) ◽  
pp. E2590-E2607 ◽  
Author(s):  
Napoleon A. Chagnon ◽  
Robert F. Lynch ◽  
Mary K. Shenk ◽  
Raymond Hames ◽  
Mark V. Flinn
Keyword(s):  
Parental Control ◽  
Mating Strategies ◽  
Cultural Norms ◽  
Mate Competition ◽  
Same Sex ◽  
Cousin Marriage ◽  
Fitness Consequences ◽  
Traditional Societies ◽  
Opposite Sex ◽  
Lower Fertility

Marriage in many traditional societies often concerns the institutionalized exchange of reproductive partners among groups of kin. Such exchanges most often involve cross-cousins—marriage with the child of a parent’s opposite-sex sibling—but it is unclear who benefits from these exchanges. Here we analyze the fitness consequences of marrying relatives among the Yanomamö from the Amazon. When individuals marry close kin, we find that (i) both husbands and wives have slightly lower fertility; (ii) offspring suffer from inbreeding depression; (iii) parents have more grandchildren; and (iv) siblings, especially brothers, benefit when their opposite-sex siblings marry relatives but not when their same-sex siblings do. Therefore, individuals seem to benefit when their children or opposite-sex siblings marry relatives but suffer costs when they, their parents, or same-sex siblings do. These asymmetric fitness outcomes suggest conflicts between parents and offspring and among siblings over optimal mating strategies. Parental control of marriages is reinforced by cultural norms prescribing cross-cousin marriage. We posit that local mate competition combined with parental control over marriages may escalate conflict between same-sex siblings who compete over mates, while simultaneously forging alliances between opposite-sex siblings. If these relationships are carried forward to subsequent generations, they may drive bilateral cross-cousin marriage rules. This study provides insights into the evolutionary importance of how kinship and reciprocity underlie conflicts over who controls mate choice and the origins of cross-cousin marriage prescriptions.

Neural activation during anticipation of opposite-sex and same-sex faces in heterosexual men and women

NeuroImage ◽  
2013 ◽  
Vol 66 ◽  
pp. 223-231 ◽  
Author(s):  
Katja N. Spreckelmeyer ◽  
Lena Rademacher ◽  
Frieder M. Paulus ◽  
Gerhard Gründer
Keyword(s):  
Heterosexual Men ◽  
Neural Activation ◽  
Same Sex ◽  
Men And Women ◽  
Opposite Sex

scholarly journals Sex Differences in the Motivation for Viewing Sexually Arousing Images

2021 ◽  
Author(s):  
Maiko Kobayashi ◽  
Koyo Nakamura ◽  
Katsumi Watanabe
Keyword(s):  
Sex Differences ◽  
Reproductive Strategies ◽  
Sexual Motivation ◽  
Visual Images ◽  
Viewing Time ◽  
Short Term ◽  
Behavioral Measures ◽  
Men And Women ◽  
Opposite Sex

AbstractSexual motivation strongly influences mate choice and dating behavior and can be triggered by merely viewing sexually arousing visual images, such as erotic pictures and movies. Previous studies suggested that men, more than women, tend to search for sexual cues that signal promiscuity in short-term mates. However, it remains to be tested whether sex differences in the motivation to view sexual cues can be observed by using robust and well-controlled behavioral measures. To this end, we employed a pay-per-view key-pressing task. Japanese self-identified heterosexual male and female participants viewed images of men, women, or couples with two levels of sexual arousal (sexual vs. less sexual). Participants could alter the viewing time of a presented image according to their willingness to keep viewing it. Male participants were the most eager to view sexually arousing images of the opposite sex, whereas female participants were more strongly motivated to view less sexual images of couples. Such sex differences may reflect differentiated reproductive strategies between men and women in terms of men’s motivation toward promiscuity and women’s motivation toward long-term relationships.

scholarly journals Mice modulate ultrasonic calling bouts according to sociosexual context

2018 ◽  
Vol 5 (6) ◽  
pp. 180378 ◽  
Author(s):  
Yui K. Matsumoto ◽  
Kazuo Okanoya
Keyword(s):  
Biomedical Research ◽  
Biological Significance ◽  
Reproductive Behaviour ◽  
Social Contexts ◽  
Same Sex ◽  
Simple Complex ◽  
Opposite Sex ◽  
Ultrasonic Communication

Mice produce various sounds within the ultrasonic range in social contexts. Although these sounds are often used as an index of sociability in biomedical research, their biological significance remains poorly understood. We previously showed that mice repeatedly produced calls in a sequence (i.e. calling bout), which can vary in their structure, such as Simple, Complex or Harmonics. In this study, we investigated the use of the three types of calling bouts in different sociosexual interactions, including both same- and opposite-sex contexts. In same-sex contexts, males typically produced a Simple calling bout, whereas females mostly produced a Complex one. By contrast, in the opposite-sex context, they produced all the three types of calling bouts, but the use of each calling type varied according to the progress and mode of sociosexual interaction (e.g. Harmonic calling bout was specifically produced during reproductive behaviour). These results indicate that mice change the structure of calling bout according to sociosexual contexts, suggesting the presence of multiple functional signals in their ultrasonic communication.

scholarly journals INTRASEXUAL COMPETITION AMONG HUMANS: PROSOCIAL TOWARDS THE OPPOSITE SEX AND PROSELF TOWARDS THE SAME SEX?

2017 ◽  
Vol 11 (1) ◽  
pp. 42-50
Author(s):  
Grzegorz Pajestka
Keyword(s):  
Intrasexual Competition ◽  
Value Orientation ◽  
Social Value ◽  
Social Value Orientation ◽  
Sex Partners ◽  
Same Sex ◽  
Orientation Measurement ◽  
Men And Women ◽  
Measurement Tools ◽  
Opposite Sex

In a research conducted on a sample of participants from three countries (N = 256): Poland, Ukraine and Denmark, a hypothesis of the moderating impact of other person sex on the level of social value orientation of men and women was tested. The study applied the now rarely used method of measuring social value orientation: the Warsaw Method, which was expected to reveal more subtle differences between men and women than those observed in the studies using the most popular social value orientation measurement tools, such as decomposed games. The direction of the observed relationship proved to be compatible with the predictions resulting from the phenomenon of intrasexual competition for a partner, however only in the case of men. Men were more prosocial in interaction with women than with other men, and more pro-self- interacting with men rather than women. Similar relationships assumed in the case of women were only partially confirmed: women were more pro-self in interaction with same-sex partners compared to interactions with opposite sex partners (however, the relationship was statistically significant only within the individualistic value orientation), but at the same time they were prosocial (but only within the cooperative value orientation). Keywords: intrasexual competition, social value orientation, sex differences.

scholarly journals Prevalence of Sexual Aggression Victimization and Perpetration in a German University Student Sample

2021 ◽  
Author(s):  
Barbara Krahé ◽  
Isabell Schuster ◽  
Paulina Tomaszewska
Keyword(s):  
Sexual Aggression ◽  
Research Literature ◽  
Sex Partners ◽  
Prevalence Rates ◽  
Same Sex ◽  
Student Sample ◽  
Men And Women ◽  
Before And After ◽  
Victimization Rate ◽  
Opposite Sex

AbstractThis study examined the prevalence of sexual aggression perpetration and victimization in a sample of 1,172 students (755 female, 417 male) from four universities in Germany. All participants were asked about both victimization by, and perpetration of, sexual aggression since the age of 14 years, using the Sexual Aggression and Victimization Scale (SAV-S). Prevalence rates were established for different coercive strategies, sexual acts, and victim–perpetrator relationships. Both same-sex and opposite-sex victim–perpetrator constellations were examined. The overall victimization rate was 62.1% for women and 37.5% for men. The overall perpetration rate was 17.7% for men and 9.4% for women. Prevalence rates of both victimization and perpetration were higher for participants who had sexual contacts with both opposite-sex and same-sex partners than for participants with exclusively opposite-sex partners. Significant overlap was found between victim and perpetrator status for men and women as well as for participants with only opposite-sex and both opposite-sex and same-sex partners. A disparity between (higher) victimization and (lower) perpetration reports was found for both men and women, suggesting a general underreporting of perpetration rather than a gendered explanation in terms of social desirability or the perception of consent cues. The findings are placed in the international research literature on the prevalence of sexual aggression before and after the #metoo campaign, and their implications for prevention efforts are discussed.

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