Among the small group of species (e.g., some temperate zone turtles, snakes, and bats) that exhibit a dissociated reproductive pattern, the red-sided garter snake (Thamnophis sirtalis parietalis) is probably the most well studied. For these species, courtship and mating occur immediately upon emergence from winter dormancy; the gonads remain essentially inactive. Male red-sided garter snakes ar...

INTRODUCTION Considerable debate exists in the contemporary scientific literature regarding the origin and existence of sex differences in the behavior of women and men (1). Recently, evidence was found for the existence of DNA loci that may relate to sexual orientation in man (2,3). A number of other studies [for reviews see (4-6)] have attempted to establish a biological basis for gender diff...

The effects of chronic psychosocial stress on sexual behavior and on the serotonergic type 2A (5-HT2A) receptor-mediated behavior "wet dog shakes" (WDS) were investigated in male and female rats. In Experiment 1, both bilaterally adrenalectomized and sham-adrenalectomized female rats were assigned to either a psychosocial stress condition or a control condition for 62 days. On the 63rd day, est...

Objectives: We examined sexual identity and its relationship with risky sexual behavior among 60 men who have sex with men in Accra, Ghana and Lomé, Togo. Methods: We used mixed-methods to investigate this relationship. Results: Quantitative results show that negative sexual identity leads to risky sexual behavior. For example, exchanging sex for valued resources is, positively associated with ...

In spite of recent interest in sexual selection in females, debate exists over whether traits that influence female-female competition are sexually selected. This review uses female-female aggressive behavior as a model behavioral trait for understanding the evolutionary mechanisms promoting intrasexual competition, focusing especially on sexual selection. I employ a broad definition of sexual ...

W e (your guest editors) have established a productive professional and personal relationship through discussions of the role of experience and, in particular, basic learning processes in shaping sexuality in humans and animals. We are grateful to Harold Mouras as well as our contributors for allowing us to organize this special issue of Socio-affective Neuroscience & Psychology, which highligh...

Background: In this study, we report the first case of a male reef manta ray, Mobula alfredi, becoming sexually mature in captivity and present its reproductive characteristics. Methods: We investigated changes in external morphology, behavior, and levels of steroid hormones in a male M. alfredi during its sexual maturation process. Results: At 2 years and 6 months of age, the male exceeded 300...

Seven hundred and two (346 non-Asian, 356 Asian) undergraduate volunteers were assessed in a confidential laboratory setting on levels of interpersonal sexual behavior (e.g., petting, intercourse), intrapersonal sexual behavior (e.g., fantasy, masturbation), and sociosexual restrictiveness (e.g., lifetime number of partners, number of "one-night stands"). The purpose was to examine possible dif...

Effects of ambivalent sexism, sexism norms, victim behavior, and type of violence on male students' reactions to male violence against women in intimate relationships were examined. Participants judged a scenario depicting an act of sexual or non-sexual violence against a female partner who had either shown overtly sexual or non-sexual behavior toward another man. Generally, high (vs. low) host...