Here’s a thesis: the feminism of the 70s was a reaction specifically to the trends of the 60s. You can see this here in 2 places: the double standard and easy acceptance of male infidelity; and attitudes to divorce.

The trope of society praising male promiscuity is largely an invention of the 20th century.

Biblical and Hebrew texts all encourage punishment of both man and woman in instances of adultery.

As a man I don’t like promiscuous men because they’re competition. I don’t want to introduce my female friends to them because they’re not relationship material, and I don’t find them trustworthy as a wingman. Call it jealousy, but I think the same dynamic applies to the other gender.

that double standard exists for a rather obvious reason -- male infidelity biologically cannot result into their cuckolded partner unwittingly raising someone else's child, while female infidelity often results into that to this very day. the state will, in fact, force the victim to provide for the child if he doesn't immediately realize the child isn't his.