I think a lot of people don't. They think about more attractive people when they have sex with each other, basically two fat people using each other as masturbatory aids as they each pretend to be more attractive than they actually are as well. One fat fuck of a dumbass dude described his "avatar" to me and said that he pretended to be Peter North every time he had sex. I guess what he and his partners had in common was that they were both pretending he was somebody else.