This is what obese patients tell us. The question is, is sugar addictive . Has anybody seen this movie . Ive got another clip. Im hoping this one works. Yes. [indiscernible] im feeling really, really sick and unhappy. I started eating and over eight. Over ate. I felt so good, it was crazy. Now, does everybody know the story . Morgan spurlock was a vegan because his girlfriend was a vegan chef. He started eating mcdonalds for 30 days nonstop every meal. This is day 18. He just described withdrawal. It can happen to anybody. If you down regulate those dopamine receptors, youre going to need a bigger hit in order to do that. That is called abuse. Finally, externality, in negative impact on society. Societal intervention says that your abuse of a substance has to affect me in a negative way for us to regulate it. For instance, nobody is saying we should regulate caffeine. Your use of caffeine does not affect me. If you smoke or drink or take drugs, that is bad for me, because of Secondhand