Why is Sex Fun?

Why Is Sex Fun? - The Evolution of Human Sexuality is a 1997 book by Jared Diamond dealing with the evolutionary development of human sexuality. Diamond addresses some peculiar aspects of human sexuality. These include why women's ovulation is not overtly advertised; why humans have sex in private rather than in public, as is the case in all other mammals; and why the ovaries are u-shaped. The book came five years after Diamond's previous work The Third Chimpanzee and was published in the same year as the well known title Guns, Germs, and Steel. It is dedicated to his wife Marie.

The Evolution of Human Sexuality

Evolution of Sexuality in Homlininae

Involvement of the father in education, concealed ovulation and menopause in women, sex in private, are quite unique to our species, at least when compared to other Homininae. Testis and penis size are related to the family structure: monogamy or promiscuity, harem, in human, chimpanzee and gorilla, respectively.

See also

• Concealed Ovulation
• Homininae
• Human sexuality
• Longevity
• Menopause
• Penis size
• Sexual selection
• The Third Chimpanzee