I think the more fundamental point is that a sexually promiscuous woman can't be trusted to produce true offspring.

The ultimate reproductive nightmare for a man is to fail to reproduce and spend all his time and energy raising some other dude's kids. This is why men often kill their wives when they find them cheating.

I think cuckoldry is a low-self-esteem man hoping (perhaps subconsciously) that if he gives the woman all his resources he'll at least get to put one of the buns in her oven. I think there's also a hope that if the woman gets all worked up for Mr. Hot then Mr. Simp will have his way with her as well.

The ultimate reproductive nightmare for a woman is that she has kids who are sick or retarded and won't go on to reproduce themselves. This is why women get post-birth depression and kill their babies. This is also why women are promiscuous with men who show excellent health (or to a lesser extent, status), even without the assurance of resources from the father.

I think white men are more sensitive to abstract concepts of resources (than women or nons) and that women's dream man earning 6 figures (probably 7 or 8 in today's economy) is more about status and ability than about money directly.

I don't think there's ever been a shortage of whores, though.