>> larry: dr. pinsky, the late lenny bruce, very funny guy once said there must be a good side to drug addiction or else why would so many people take it and they say it kills you and they race down to the store to get it or steal it or whatever you k how does the brain deal with that? why would any person with a brain take cone cane? >> there's two answers to that question, one is why you start using it and why you can't stop using it. the starting is you're trying to find a solution to a problem, you're trying to feel better. >> larry: and your brain tells you this? >> culture tells you that, and guess what? it works. they use drugs because they work. they do feel better, a lot better for an extended period of time many times and then a second phenomenon kicks in which is the disease of addiction and in spite of out no longer working, i would like to call it the do it again part of their brain has been altered in such a way to require them to do it