Would you like a cigarette?
No, thanks. I've decided to give up smoking.
Really? Why?
Well, it's just that I think if you don't enjoy doing something any more, you should stop doing it.
I see. You mean you don't enjoy smoking any more?
That's right. You should give it up, too. It's bad for your health.
Stop talking like my mother. That's what she keeps saying.
But it's true. It's a nasty habit. I can't think why I ever started. Anyway, it's obviously got you in its grip!
What do you mean? What are you talking about?
I mean you couldn't give it up!
Who? Me? Could't give up smoking? Nonsense! Of course I could! I know I could!
How do you know?