If you're working out in front of a mirror and watching your muscles grow, your ego has reached a point where it is now eating itself. That's why I believe there should be a psychiatrist at every health club, so that when they see you doing this, they will take you away for a little chat.
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I think it's important that people think about what they are doing and that includes what they are eating. I am 61 now and attitudes towards drinking and driving have changed radically since I was a student. People change their notion of what is responsible. They will increasingly ask about the carbon content of their food.