How do I make sex less enjoyable for my girlfriend?

Oh you've got a right slapper there mate. Get her into swinging and there'll be other blokes to satisfy her carnal lusts. You can usually manage to tune the TV's into the Sports Channels at those clubs. A lot of the guys are there for the same reason you know? Just tell all the girls you want to watcvh them get it on together anhd the randy slags will be at it hammer and tongs. Then you guys can catch up with the FA cup and the cricket on the screens...just make sure their backs are to the screen cause hot pants chicks like that ccan get all bent out of shape (pardon the pun) when they realise they're not the centrre of attention.