He heard me telling my SIL and MIL that of course my hips are hurting when sleeping because you are not supposed to sleep on your back. So he says to me "Why can't you sleep on your back? Is it because you're so fat?" I thought he was joking at first, but he didn't start laughing. What a moron. No wonder he's 25 and has not had a girlfriend in about 5 years.