The reality is that fat people are often supported in hating their bodies, in starving themselves, in engaging in unsafe exercise, and in seeking out weight loss by any means necessary. A thin person who does these things is considered mentally ill. A fat person who does these things is redeemed by them. This is why our culture has no concept of a fat person who also has an eating disorder. If you’re fat, it’s not an eating disorder — it’s a lifestyle change.