Science Question

This is a weird question, but I sometimes think the human body seriously has some faults. Why do fat people get hunger pain? I mean if your body supposedly doesn't need any more food and there is "excess energy" abounding all over the thing, why does someone like a 500lb person like me get hunger pain? I haven't eaten breakfast and would rather write right now, but this body seems like a bratty toddler screaming at me, "Feed me!", "Feed me!", growling stomach and all.