When I was a kid (both parents smoked), I hated it, and thought I would be the last person to ever smoke. I gave them hell for it.
Then in HS, a couple of girls I was friends with dared me to take a drag (just to see if I would do it). I did it, and ended up liking it. So then it was 1 cig after school everyday with them, and it progressed from there. Now I'm smoking just shy of a pack a day when at work, and about half a pack a day when not working. Damn hot women!

If not for them I would of never started.