The mentally challenged can be excellent workers. Generally their integrity and work ethic is stellar and they're the nicest, most agreeable co-workers you'll ever have. They might not do every job the best but they'll almost die trying. Fats on the other hand get nothing fucking done ever and all you hear is bitching and moaning and whining and endless excuses. The world would be a better place if every fat person was replaced with a thin downy.