Explaining Sex Law Against adultery:Contract enforcement Especially against female adultery-the double standard Men don't get pregnant,and men want to rear their own children Male adultery can divert resources away from the wife For both,a link between sexual exclusiveness and emotional commitment 。Against fornication Akerlof-Yellin argument:Women who want to get married don't want competition If marriage produces better children,and fornication undermines marriage That's an argument for discouraging fornicationExplaining Sex Law • Against adultery: Contract enforcement • Especially against female adultery—the double standard • Men don’t get pregnant, and men want to rear their own children • Male adultery can divert resources away from the wife • For both, a link between sexual exclusiveness and emotional commitment • Against fornication • Akerlof-Yellin argument: Women who want to get married don’t want competition • If marriage produces better children, and fornication undermines marriage • That’s an argument for discouraging fornication