smoking by studying individuals in same-sex households (a large share of whom are in same-sex romantic relationships) from the … and women in same-sex households, and the effects we find for men in same-sex households are significantly larger than the … associated effects for men in different-sex households (the vast majority of whom are heterosexual married/partnered men). This …

purchase of condoms and suggestive evidence on decreased condom use during sex. More sex and less contraceptive use may be … discounting and ignoring costs associated with risky sex. These findings are consistent with a large observational literature …

significantly increases participation in sex, promiscuity, and the failure to use birth control, albeit by amounts considerably … sex than protective behavior. Effects are much larger for the small fraction of students that has not been taught about …

age 18-24 four-year college students. For having sex, overall or without condoms, large and significant positive …, strong relationships persist for sex with multiple recent partners, overall and without condoms, even controlling for … instrumental variables strategy and accounting for whether sex is immediately preceded by alcohol use suggest that binge drinking …

Societies socialize children about sex. This is done in the presence of peer-group effects, which may encourage … children against its costs. Churches and states may stigmatize sex, both because of a concern about the welfare of their flocks …