The problem is that these beasts actually think that they're exercising self-control. Because their idea of "eat whatever we want" is VERY different from a human's. They want to eat 2 dozen donuts in a sitting or two large pizzas for a snack or drink 4 liters of soda a day. So only eating one dozen donuts or a single large pizza or 2 liters of soda is somehow a huge sacrifice that deserves applause. What's left of their brains is broken.