I'm no smoker, but I'm ashamed to be associated with the non-smokers on this thread. Addictions are serious issues that quite often have a cellular/genetic basis. Some forms of addiction are also indicators of mental health problems such as OCD. So before all the self-righteous do-gooders start harping on people who smoke, answer me this: would you be so negative and derogatory to someone who was obese? If so, go ahead and start a thread entitled, "Any fat pre-dents here?" so that you can rip into them for a while. After all, as future doctors (and yes, dentists are doctors) shouldn't we all be thin and healthy?