Opponents of same-sex marriage argue that it will lead to a further weakening of the institution of marriage. But some research shows that there are strengths in same-sex marriage from which heterosexual couples could learn. Same-sex couples tend to be happier and have less conflict, and they are more likely to share equally in household chores and childrearing. Because they don’t have fixed gender roles to follow, same-sex couples have to do more negotiating to make the relationship work. “If a genderless marriage is a marriage in which the wife is not automatically expected to be responsible for school forms and child care and dinner preparation and birthday parties and midnight feedings and holiday shopping, I think it’s fair to say that many heterosexual women would cry ‘Bring it on!’” says Liza Mundy (Atlantic, June).