This is why size acceptance and self-acceptance are so important. One major difference between the morbid obese and others is the feeling of satisfaction and the sensation of fullness that most people have after eating a normal portion of food. It appears most morbidly obese do not have this appetite regulation mechanism.
People are often at war with their own bodies.
If you are a super-sized person in our society, you are a target. A target for uncomplimentary remarks, rude stares, and constant ridicule. Super-sized individuals often feel like the moral equivalent to leprosy. Craving fat appears to be a primal survival trait for animals. For thousands of years this trait served humans well.