It's a very weird cultural perception that if you're fat you're dumb, that you're lazy or a loser. Clearly, those are the preconditions for fatness. You're a failure, because only a lazy person, only a dumb person, would allow themselves to get into this situation. It's appalling that this is the mindset. People generally treat fat people like we don't know anything about anything. It's incredibly demeaning. And incredibly frustrating.