Regret and anticipated regret enhance decision quality by helping people avoid making and repeating mistakes. Some of people's most intense regrets concern sexual decisions. We hypothesized evolved sex differences in women's and men's experiences of sexual regret. Because of women's higher obligatory costs of reproduction throughout evolutionary history, we hypothesized that sexual actions, par...

Sexual conflict over mating rate is both pervasive and evolutionarily costly. For females, the lifetime reproductive fitness costs that arise through interactions with potential mates will be influenced by the frequency of such interactions, and the fitness cost of each interaction. Both of these factors are likely to be influenced by variation in operational sex ratio (OSR) and population dens...

Facial attractiveness represents an important component of an individual's overall attractiveness as a potential mating partner. Perceptions of facial attractiveness are expected to vary with age-related changes in health, reproductive value, and power. In this study, we investigated perceptions of facial attractiveness, power, and personality in two groups of women of pre- and post-menopausal ...

Nina Wedell is a Professor of Evolutionary Biology at the University of Exeter based at the Cornwall Campus, UK. She studies the evolutionary ecology of sex, in particular the role of selfi sh genetic elements in sexual selection and sexual confl ict. Her current research explores the potency of selfi sh genes in shaping the reproductive biology, mating system and even the sex of their host, an...

Species with wide distribution, generally show variations in life history characteristics, which can be attributed to environmental causes. In this study, we analyzed the reproductive cycle and reproductive characteristics from three populations (Atlapexco, San Pablo Tetlapayac, and Santa Catarina) of the lizard Sceloporus variabilis from central Mexico. The specific goal of this study was to e...

Youths in Bolgatanga municipality in the Upper East Region in the rural north of Ghana suffer health and social problems that are caused by their premarital and unsafe sexual behaviour. This study provides more knowledge of and insight into the youths' conceptions, motives and practices concerning premarital sex in the specific cultural and social context of Bolgatanga municipality. The results...