 There are, however, several objections that are made against this account of marriage as a central human good. One is that by placing procreation as the ‘natural fulfillment’ of marriage, sterile marriages are thereby denigrated. Sex in an opposite-sex marriage where the partners know that one or both of them are sterile is not done for procreation. Yet surely it is not wrong. Why, then, is homosexual sex in the same context (a long-term companionate union) wrong (Macedo, 1995)? The natural law rejoinder is that while vaginal intercourse is a potentially procreative sex act, considered in itself (though admitting the possibility that it may be impossible for a particular couple), oral and anal sex acts are never potentially procreative, whether heterosexual or homosexual (George, 1999a). But is this biological distinction also morally relevant, and in the manner that natural law theorists assume? Natural law theorists, in their discussions of these issues, seem to waver. On the one hand, they want to defend an ideal of marriage as a loving union wherein two persons are committed to their mutual flourishing, and where sex is a complement to that ideal. Yet that opens the possibility of permissible gay sex, or heterosexual sodomy, both of which they want to oppose. So they then defend an account of sexuality which seems crudely reductive, emphasizing procreation to the point where literally a male orgasm anywhere except in the vagina of one’s loving spouse is impermissible. Then, when accused of being reductive, they move back to the broader ideal of marriage.