If we’re speaking honestly, we don’t really need much of an added incentive to eat a donut. Really, a sweet, inexpensive indulgence that we can eat with our hands is pretty much a laser-guided strike on our willpower.
Still, we can usually muster enough self-control that we don’t plow through a half-dozen in one sitting. But when you take donuts’ numerous preexisting merits and add the visual appeal of shaping them like cats, penguins, alpacas, and even killer whales, that’s when we stop even trying to resist them.