Set up a camera in plain view and start recording them. I guarantee they will stop and if not, post that shit. And just to clarify a few things.. Cuddling is NOT for after sex!! Going to sleep, drinking a beer, or watching TV is for after sex. Dont forget that the best is to just leave after sex. My personal fav by the way. Maybe if you quit being a prude and brought a guy home and went at it in front of them, they may change a bit. Im sure there are enough leg humpers on here that already want to meet you. Or you could just put out a Craigslist ad. :)