That is one thing I noticed quite frequently when I was a member, the lack of hygiene these girls displayed. They did tend to wear the same underwear over and over and not to mention licking the rim of jars or double dipping that goes on with these girls LOL.
As for sitting on other peoples couches lol, it depends on who those other people are I suppose. I don't have any problem sitting on any of my relatives couches or some of my close friends but when it comes to people I don't know, I kind of look for a chair to sit on.....a wooden chair at that lol. I myself along with most of my family have leather as well and like you said, much easier to keep clean!!