But more seriously, look for "ob ob mouse" OP, it's a thing, they fuck up their genes => the mouse does not produce leptin and becomes huge because it's never satiated.  I don't think that's what they were talking about in your quiz but here we can see why fats once again don't deserve to live.  Scientists fuck up helpless mice just to study obesity or find "the cure" when it's just as simple as DON'T EAT SO FUCKING MUCH.