This issue came up last night in a seminar I was doing for dentists. One of them noted just how many of his young patients were smokers and I could see he was wondering how with all that is known about smoking today how could such a trend be happening. He is right that people in the medical profession often know a lot about the harmful effects of smoking but unfortunately the knowledge is not always passed along to the people who need it the most. Also, while people here the phrase that nicotine is addictive most people grossly underestimate just how addictive this product actually is.