Perspectives on sexuality -- Sex and evolution -- Women's bodies -- Men's bodies -- Sex hormones and the menstrual cycle -- Sexual development -- Gender -- Attraction, arousal, and response -- Sexual behavior -- Sexual relationships -- Fertility, pregnancy, and childbirth -- Contraception and abortion -- Sexuality across the life span -- Sexual orientation -- Atypical sexuality -- Sexual disorders -- Sexually transmitted diseases -- Sexual assault, harassment, and partner violence -- Sex as a commodity.