Imagine that I’ve hooked you up to the most sensitive polygraph in the world. You are all wired up, and the machine can detect your carbohydrate cravings. If you have a carbohydrate craving, the machine will tell me. I want to give you an extra incentive, so there’s a 44 magnum hooked up to the machine, next to your temple, pointed at the ceiling, but the gun will go off and make a really loud unpleasant noise, every time you get a carbohydrate craving. So don’t get a carbohydrate craving. Don’t even think about carbohydrates, or the gun is going to go off. No cravings, or the gun goes off. Silly, isn’t it?