Since man's sexual strategy is to spread the seed to as many women as possible, the real purpose of religion is to curve that. I keep listening to Rollo and he talks about checks and balances on hypergamy. Well, just like there is or rather use to be checks and balances on hypergamy, there is checks/balances on males as well. Well more like conditioning.

Religion makes it immoral to fuck so many women. Some restrict it to marriage only (like Islam for example). But as long as you have a social contract with them, you can marry and then fuck as many as you want.

Religion in this sense sets man against his own sex drive, his own nature. All the while placating to and supporting the female sexual strategy. It's quite brilliant.