My master bed is a twin, so it can barely fit one person comfortably so giving it up won't help anyone as no one really wants to sleep on a twin bed (my family's words), and it's a couple of degree's warmer than the other bedroom. Plus I have all of my personal belongings in there, so I'd have to keep coming into the room to grab something or to use that bathroom. Even if I had a bigger bed I wouldn't be giving up the master bedroom for anyone, I don't feel comfortable enough for anyone to be sleeping in there.