I just got back from my workout - and I'm going to use my sweaty butt to the loser. I sit down on his face and rub my sweaty ass all over his face - while smothering him at the same time. I try out some different positions, but always make sure the loser can't breathe. Again and again I smother him and in the end he's just as much out of breath as he'd be after a good workout :-D