§ Marriage equality is about love, romance, commitment, settling down, starting a family. People love love! But marriage equality is also about tying love to family values, expanding a conservative institution that has already lost most of its coercive social power and become optional for millions. (Marriage equality thus follows Pollitt’s law: Outsiders get access when something becomes less valued, which is why women can be art historians and African-Americans win poetry prizes.) Far from posing a threat to marriage, as religious opponents claim, permitting gays to marry gives the institution a much-needed update, even as it presents LGBT people as no threat to the status quo: Instead of promiscuous child molesters and lonely gym teachers, gays and lesbians are your neighbors who buy Pottery Barn furniture and like to barbecue.

Reproductive rights, by contrast, is about sex—sexual freedom, the opposite of marriage—in all its messy, feckless glory. It replaces the image of women as chaste, self-sacrificing mothers dependent on men with that of women as independent, sexual, and maybe not so self-sacrificing. It doesn’t matter that contraception is indispensable to modern life, that abortion antedates the sexual revolution by thousands of years, that plenty of women who have abortions are married, or that most (60 percent) who have abortions are already mothers. Birth control and abortion allow women—and, to a lesser extent, men—to have sex without punishment, a.k.a. responsibility. And our puritanical culture replies: You should pay for that pleasure, you slut.

§ Same-sex marriage is something men want. Lesbian couples account for the majority of same-sex marriages, but even the vernacular “gay marriage” types it as a male concern. That makes it of interest to everyone, because everything male is of general interest. Though many of the groundbreaking activists and lawyers who have fought for same-sex marriage are lesbians, gay men have a great deal of social and economic power, and they have used it, brilliantly, to mainstream the cause.

Reproductive rights are inescapably about women. Pervasive misogyny means not only that those rights are stigmatized—along with the women who exercise them—but that men don’t see them as all that important, while women have limited social power to promote them. And that power is easily endangered by too close an identification with all but the most anodyne version of feminism. There are no female CEOs pouring millions into reproductive rights or threatening to relocate their businesses when a state guts access to abortion. And with few exceptions, A-list celebs steer clear.