It doesn't really seem like that far a stretch if you look at it in the lens of "the species Homo Sapien and its mating rituals". If a successful mating occurs, the woman cannot breed for at least 9 more months.
If a man successfully impregnates a woman, he can do it again as soon as he is physically able to commit the act again.
So it's in the woman's best interest to be selective while it is in the man's best interest to not be selective at all.
It's believed that women died in childbirth somewhere up to 1/4 of the time for most of our history (until a few thousand years ago, since when it's slowly but greatly improved) due to our enormous heads, which would probably be the largest reason. Plus they were rather less able than normal to fend for themselves for a few months right beforehand, and were too busy (if they wanted their little bundle of genes to survive anyway) to do so for a while after.
If a man successfully impregnates a woman, he can do it again as soon as he is physically able to commit the act again.
So it's in the woman's best interest to be selective while it is in the man's best interest to not be selective at all.