Planning to have just one Girl Scout cookie is always the idea, then suddenly a whole sleeve of Samoas has disappeared. Who among us can honestly say such a slip of self-control has never happened? It is, quite literally, natural. When we eat certain things—sugar, usually, but also carbohydrates and proteins—parts of our brain light up with utter delight. Consuming sugar produces dopamine in your brain, as nutritionist Dana James explains. “Dopamine,” she says, “is a pleasure neurotransmitter, and so sugary foods are very pleasurable. And we need to have that response, otherwise people wouldn’t eat food.” Read more at Vice.