Men more highly value same-sex friends who are physically formidable, possess high status, possess wealth, & afford access to potential mates; women more highly value friends who provide emotional support, intimacy, & useful social information

Sex differences in friendship preferences. Keelah E.G. Williams et al. Evolution and Human Behavior, November 10 2021. https://doi.org/10.1016/j.evolhumbehav.2021.09.003

Abstract: Friendships can help us solve a number of challenges, increasing our welfare and fitness. Across evolutionary time, some of the many challenges that friendships helped to solve may have differed between men and women. By considering the specific and potentially distinct recurrent problems men's and women's friendships helped them solve, we can derive predictions about the qualities that would have made men's and women's same-sex friends ideal partners. This logic leads to several predictions about the specific friend preferences that may be differentially prized by men and women. Across three studies (N = 745) with U.S. participants—assessing ideal hypothetical friends, actual friends, and using a paradigm adapted from behavioral economics—we find that men, compared to women, more highly value same-sex friends who are physically formidable, possess high status, possess wealth, and afford access to potential mates. In contrast, women, compared to men, more highly value friends who provide emotional support, intimacy, and useful social information. Findings suggest that the specific friendship qualities men and women preferred differed by sex in ways consistent with a functional account of friendship.

Keywords: FriendshipSex differencesEvolutionary psychologyFriend preferences