Recommended reading the these three selections of pages from peer-reviewed articles: Pages 365-370 in Lewis, D. M. G., Al-Shawaf, L., Conroy-Beam, D., Asao, K., & Buss, D. M. (2017). Evolutionary Psychology: A How-To Guide. American Psychologist, 72(4), 353–373. Pages 1-14 in Buss, D. M. (1989). Sex differences in human mate preferences: Evolutionary hypotheses tested in 37 cultures. Behavioral and Brain Sciences, 12, 1- 49. Page 164 (paragraph begins on Page 163) in Conway, L. G., III, & Schaller, M. (2002). On the verifiability of evolutionary psychological theories: an analysis of the psychology of scientific persuasion. Personality and Social Psychology Review, 6(2), 152-166.