If this was a bloke having his way with three girls a week, how many here would be condemning him? And stop lying.
Probably no-one. But men are built for it, physically and emotionally, women are not. The point of being a man, biologically, is to spread seed. For women, it's to receive seed and to raise kids.
Remember, if a key opens many locks, it's a master key. But if a lock can be opened by lots of keys, then it's a crappy lock.