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April 23, 2025 33 mins

Jared Diamond's "Why Is Sex Fun?" explores the evolutionary reasons behind unique aspects of human sexuality, contrasting them with those of other mammals. The book examines phenomena like recreational sex, concealed ovulation, menopause, and male parental care, presenting various scientific theories for their development and persistence. Diamond analyzes the battle of the sexes in humans and other animals, highlighting conflicts of interest arising from differing reproductive investments. He also discusses body signals and mate selection, applying evolutionary principles to understand human physical traits and behaviors. Ultimately, the book seeks to unravel the adaptive significance of human sexual characteristics by considering biological, ecological, and social factors.

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