Because they clearly aren't ok with themselves. No one at that weight should be. It's all internalized anger and self-loathing.  NinjaEdit: Not that internalized anger and self-loathing is just a fat people thing. I mean, that's kind of natural. It's the blindness to their "disability" that gets me. We are all blind to things, and we count on other people to point out our deficiencies. When people stop doing that, they have given up on you.