What makes you suddenly dart into the bakery when you spy chocolate-frosted donuts in the window, though you certainly hadn’t planned on indulging? As you lick the frosting off your fingers, don’t blame a lack of self-control. New research reveals how hunger works in the brain and the way neurons pull your strings to lunge for the sweet fried dough. The research demonstrates how our brain decides what to pay attention to in a world full of stimuli — not just sweets.