I don't mind girls who sleep around because I sleep around myself. I'm of an age where my relationships tend to be strictly for fun, so providing the girl has no STIs/Ds and picks my fancy then I'm happy. It's sometimes a plus as she knows what she's doing, too.
I'm not saying I go with every girl who sleeps around as like many lads, some are desperate. I just don't mind a girl who does sleep around.