Valid point Iota - I don't advocate sleeping around for either men or women.
But thanks to the same evolutionary wiring you mentioned, a man sleeping around doesn't do as much "damage" to him as it'd to a woman. The degree is much lesser and recoverable.
Say, for instance, a man who's slept with 50 women is comparable to a woman who's slept with 5.
Again, these are all hypothetical numbers but sharing them for illustrative purposes.
But civiization demands sexual restraint - from both women and men.
So this isn't a men vs women issue - but a man+woman vs degeneracy issue