I had the misfortune to run across some bad behaviour earlier today. In the form of children playing in a local park that I walk a short loop around (FitBit for the win and much needed to knock off a couple of kilos of Christmas cheer). Looked like three families, with only one man in attendance - picking the other two wimminz were single mommies, no way to be sure though.
Some young kids are playing with some toys, you can pretty-much guess what happens. Kid gets a toy, other kid decides he wants it, grab - kerfluffle - waaaaahhhh! "Don't worry little Jeremy, here, have this toy," coo's the momma. Kid grabs another toy to play with, other kid decides he wants it, grab - rinse and repeat.
Why do you think I Hate Other People's Kids was so popular? (No, that's not an Amazon Affiliate link - I live in NZ. Anyway, you readers don't need to buy it. Only teh wimminz are impulsive and stupid enough to require that book, and even that's only needed to provide them a moment's giggles and feelings of superiority over other wimminz.)
Now step back.
Look at women.
Specifically: look at teh wimminz who chase other wimminz boyfriends/husbands/current fuck-buddy/etc.
If you believe in "Hypergamy" it states that women like pre-selected men, ie men that other women like. Because it's a handy shortcut to evaluating the value of a man.
Look at those kids with the toy. Exact same mentality. "She has him. I want him! WAAAAHHHHH!!!"
This isn't hypergamy. It's fucking infantile.