Since I stopped smoking I can smell a cigarette burning at 500 yards. I guess, though, that I'm the only person on this forum who still likes the smell of a freshly lit cigarette. Stale smoke, ashtrays, walking into a smoker's house, the smell on people's breath and clothes? I can't stand that, but a freshly lit ciggy? Still smells great to me!
I didn't start smoking until I was out of my parents house so I never attempted it, but the way a non-smoker can smell a cigarette, I can't imagine what teenagers living at home are thinking when they try to hide the smell from the parents. I don't care what you do it's pretty much impossible!