@JTT,
I picked up smoking in the service, but cigarettes used to cost about .15c/pack back then, so I smoked about three packs/day, but most of it burned in the ashtray. I quit in my early thirties, but had a couple of cigars when we had our first Chicago a2k gathering a few years ago, and haven't smoked since.
Our son smokes, but he can't smoke inside the house. I can still smell the smoke when he steps into the house after smoking outside.