The thing is, for some people giving up smoking is easy as pie, for others it's incredibly difficult. I had no problem, after smoking for 20 years or so, and nor did my father in law after a lot longer than that, but we were lucky. Just gave it up like that - it wasn't a question of willpower - for some reason the addiction just hadn't kicked in.

I suspect that's a lot more common than people realise, and that many people are frightened of having a big struggle giving it up and don't try, when in fact it might even be easy enough in their case.