“When you smoke it’s to enjoy the smoke.”
Not always – sometimes it is merely to look “cool” in the eys of other kids who smoke, sometimes it is to keep one’s weight down, and very often (especially with people who have emphsema and /or lung cancer) it is because they are so highly addicted that they suffer when they don’t smoke. When they are coughing their guts up, they are not enjoying the smoke, but they still have the need to smoke. It is because of that addictive quality that smoking should be assur, because it can cause harm in any amount. The first puff taken into the lungs causes damage to the lungs. Would you stand near a burning building and deliberately inhale?????
And for anyone who wants to compare smoking to alcoholism – if it becomes such a problem for someone to refrain from excessive use of alcohol to the point where it is destroying his liver and causing harm to others (due to his impaired judgment), then he should not drink anything stronger than grape juice. In fact, the nazir cannot even do that, because he recognizes in himself that he can be nichshal. Once we know of the danger inherent in a harmful action, it is an aveira to persist in doing it.