Wow, amazing how reserved you lot are.
Personally I think it'd be great to have a gf that brought home chicks to hook up with every once in a while. As long as she's not dating them, and only bringing them around for purely physical stuff, I might as well enjoy the benefits such a situation presents to me as well.
Hell, the chick on the show didn't even want to hook up with another chick, she just knew that it would piss off her boyfriend.