The only people who should be positive about their bodies are those who have good bodies. If you are fat as a pig, or if you have no legs, or are deformed, there's nothing to be positive about. Your body sucks. Deal with it. If you can, make it better. If you can't, then learn to live with what you've got. But don't pretend to yourself that your deformity or your tubbiness is a good thing. It isn't. It's a shitty thing.