When I was 14 yrs old, my older sister told me if I ever smoked she'd beat the living s*** out of me. Since there was no end date for that, I've always assumed that if I smoke my sister will beat me half to death, and even though I've got 5" and 50# on her, I believe 100% that she could take me. So I've never smoked.
Plus it's gross, bad for you, and makes you reek to high heaven. Bleck, no thanks.