I agree that threatening to not sleep with a man because he's uncut is a terrible, horrible and just plain mean thing to do. I would never ask my man to do such a thing. Then again, I've had basically no experience with an uncut gentleman, and I chalk that up to the luck of the draw--but that's beside the point.
Clint, darlin' I say that if your buddy's woman is that petty, he deserves better. Here's to hoping he sees that, and that goes for all the other uncut fellas who've had second thoughts.