I'm with Wolfgang on that, but with cigarettes. On the rare occasions I've smoked a cigarette since I gave it up (maybe 20 or 30 years ago) I've never felt any craving to take it up again.

But I'm perfectly aware that for a lot of people that isn't the case, and for anyone who had a hard struggle giving it up, I certainly wouldn't advise risking it.

I remember when I decided to stop smoking I just gave it up like that, no hassle. I'm sure it's not a matter of willpower, it's just that different people seem to be wired up differently when it comes to such matters.