Interesting article on obesity and additiction
Seems that the same parts of the brain that drive drug addiction cause us to over eat:
http://abcnews.go.com/GMA/MindMoodNews/addictions-hardwired- brain/story?id=9699738
http://abcnews.go.com/GMA/MindMoodNews/addictions-hardwired- brain/story?id=9699738