Nothing to do with pregnancy *RANT

Recently my sister told me she walked in on her roommates doing it on the couch, and they just did not care. Since then, everytime I go over there, I do not sit on the couch. It just disgusts me because I know they didn't clean it afterwards, and most people don't. But I've always been this way. Whenever I go to anyone's house I literally do not want to sit on a cushioned couch. If your house doesn't have a leather couch, I'm standing! It's your couch, and it's my behind, I have this fear that I'm gonna itch up a storm afterwards.