Have you heard about contraception and abortion? Amount of sex had does not correlate with birth rates, with the exception of literally 0 sex. You can have sex daily all your life and not have any kids, and have sex just one time and get pregnant.

> Amount of sex had does not correlate with birth rates

I'd prefer a source for this claim over the patronizing tone

well, it's not in most of europe. rich people have more kids.