Would be very interested in your 20% of males theory. There is an old saying that once a woman has had three children, the fourth is usually by someone else, not the husband. There was a study that seemed to prove it. Which would lend credence to that assertion.

Sex drives people more than fame or money, unless they are viewed as a means to more sex options. Having a religion that says you have to be married and have children, preferably with one’s spouse, would get a lot of men to go for it. God as pimp, may be a bit far for me, but priest, or other cleric as pimp, not so much or far at all.