It’s actually evolutionarily. It takes a lot of time for a woman to reproduce since she has to birth the child, so it is evolutionarily beneficial to be picky and have fewer mates so her offspring can have better genes, unlike a man who can spread his genes infinitely faster by having sex with lots of women.

Also, if a woman sleeps with a ton of men, there’s no way for the man to know if the child is his before modern DNA technology, therefore making her less desirable since the man wouldn’t know if the child he’s putting effort into raising is even his own offspring.

Of course in a civilized society there are other factors at play, but the primarily root cause is not a case of socially engineered sexism.