For the purposes of this post, the definition of Hypergamy is: the evolutionary imperatives for a female to mate with the male who possesses the best survival genes and also to procure protection and provisioning for her and her children. In RP parlance: Alpha fux-beta bux.

In various cultures around the world, mostly Muslim, the practice of cutting out the clitori and labia of prepubescent girls then sewing the vagina shut, leaving a small hole for urine to exit is carried out. This is the male equivalent of removing a little boy's penis.

Women who have been altered this way never have normal sexual feelings. The evolutionary imperative to hypergamy is still there but vagina tingles, and the rush of lubricant leading to sexual attraction is something they don't have to deal with. Therefore, they are much less likely to cheat on/leave their husbands for another, better situation.

Female circumcision has been practiced for thousands of years. I think this is an indication of how long there has been at least a dim understanding of hypergamy and its causes. And this is why RP is much more than just a body of knowledge on how to get laid.