> If wife and husband are home during her most fertile time window in a cycle, she will instinctively “find him” [...]

Have you known many couples who had trouble trying to conceive? There's a reason fertility monitoring strips, apps, etc. are such a huge market, and it's not because people are trying to avoid pregnancy.

> [...] for some magic moments that may not be particularly planned or even romantic, rather more characterized by a delightful and clumsy urgency.

I guarantee that if you interviewed couples who had been unsuccessfully trying to conceive for a long time a large number of them would strongly disagree with using "delightful" to describe the urgency of sex during the fertility window.