Exactly, how do they explain all the people who were fat once, lost the weight and don't struggle with keeping it off? Your body doesn't revolt over less food being stuffed in it, the mind does. Obesity is a cognitive problem, not a physical one, and as it is a cognitive one, that is how you can tell what kind of person a fatty is - someone who just doesn't care about themselves. Their words are incongruent with their actions, and actions will always speak louder than words!