We’ve talked about the fact that you’re like some kind of hapless junkie. The promise of the happiness hit and the desire to avoid unhappiness, pain and fear determines all your choices. Previously, you had believed that your principles, your values and your ethics were the most important and inalienable parts of your character, but now you might be beginning to understand that they are all subordinate to the primitive feel-good mechanism in your brain - its reward centre. Ho