And if they were safe, would I derive the same pleasure from them? The answer I came up with- probably not. Part of the attraction is that you knowingly do something bad for you when you smoke.
Indeed. As I said here a while back: "I acknowledge the power of the forbidden fruit hypothesis. One of my favorite illustrations of this came in one of the futuristic 'Planet of the Apes' movies, in which a female smoker, after having an ape light her cigarette, remarks: 'You know, now that I know they won't kill me, I don't really enjoy them anymore.'"