Women's and men's sexual preferences and activities with respect to the partner's age: evidence for female choice

Sex differences in parental investment and in age-related fertility variations are expected to have shaped the sexual strategies for both sexes. To investigate sex differences in sexual interest and sexual activity as a function of both the respondents' and the objects' age, we gathered observations from a population-based sample of 12,656 Finns. We found that women are interested in same-aged to somewhat older men and that this pattern displays itself across the measured life-span and that men show a tendency to be sexually interested in women in their mid-twenties. This tendency was also notable when the men themselves were younger or older than this age. Moreover, we found that sexual activity more closely mimics women's than men's sexual interest. We conclude that women show larger developmental plasticity than men with regard to the desired object's age and that men's heterosexual activity likely is constrained by female choice.