I hear what's he's saying about the physical contact, and the feeling of dominating the player in front of you. My high school football coach use to say, on the football field you could measure yourself. You could see how tough you are, how strong you are, and if you have the mental toughness required to win. It's you versus the guy across from you.. There's not many chances in this world to test yourself like that. I think that's some of what he means when he says he's 'addicted' to the physical contact of football. I certainly miss that aspect.