"I have asserted that if sex did not naturally lead to children, no one would ever have conceived the idea of marriage.
My claim may be obvious to most people, but we live in a world in which people who never intend to have children get married; so, of course, do some people who want children but are infertile. In generations past, we felt compassion for those who married but did not have children, because it was presumed that they wanted children, since, after all, they married one another. No longer can we presume this. The era of contraception and surgical sterilization has altered the face, so to speak, of the childless couple, and consequently the face of the married couple."