A lot of these fat people who are trying to be sexy seem to take photos of themselves flipping off the people looking at them. I get the impression that they know they are utterly repulsive, understand that they also find themselves utterly repulsive, know their audience will be repulsed and are flipping them off to say: "Yeah, it's disgusting. I'm doing it to upset you, not because I'm of the mistaken impression that I look good."