I smoke. I started at age 14. I quit for 6 years, in my 20's and then thought I could have an occasional one. No go.
I like smoking, though I know it's not healthy (and people remind me of that all the time, as if I never knew it). I don't smoke indoors and I hate being in a smoky room.
There's a friend I used to visit on weekends who smoked in his house, so I did too, in his house. I got headachy and couldn't taste food very well. Even if I smoked outside, inside was still smoky. There is a big difference to me when people smoke indoors, as far as how I feel and how food tastes.
I'm not saying that I think smoking done outdoors only, is less unhealthy, although logic tells me it probably is--but it does make a big difference to me in other ways. Sometimes I smoke when I'm driving a car, but there has to be a window at least part way open, even in freezing temps.
Another thing about smoking indoors--my work is in HVAC and the air filters from places where people smoke inside are downright nasty and scary. I don't think smoking should be allowed inside any public buildings unless there is a very good ventilation system, and only in those areas well ventilated.