Explore evolutionary theories and recent psychological studies on sex and gender differences in this 53-minute lecture from Yale University's Introduction to Psychology course. Delve into the psychology behind attraction, mate preferences, and sexual orientation. Learn about basic sex education, human sex differences, the concept of beauty as an average face, and social factors influencing gender disparities. The lecture also addresses morality and inevitability in evolution, sex, and gender, concluding with a Q&A session on related topics. Gain valuable insights into human sexuality and gender psychology through this comprehensive academic presentation.