Sex is awesome! I love having sex. I love having A LOT sex! While not in a monogamous relationship, I love having sex with several women.
I've got no problem with. Society, at large, has no problem with me do it.
If I, a man, can get away with having sex with different women, why not a woman?
Fine - she's a slut and so am I!
BTW, slutty girls tend to be more interested in bed than a girl who doesn't sleep around.