French Kiss or the Lack Thereof

Scene: Mild frat party with bad music and decent lighting. Mixed drinks and beer a plus. Sizeable crowd of people dance, talk, etc. A sober N stands center stage left. A boy from Arkansas has retrieved a cigarette and light for her. They’re camels - too harsh. She lights up and sits down in a nearby plush, leather chair. In next chair sits brown-haired boy.

N: Do you might if I sit?
Brown-haired boy: No, not at all.
N: Thanks.
(pause)
BHB: Do you always smoke?
N: Not regularly. The last time I had a cigarette was three weeks ago.
BHB: That’s too bad.
N: Why?
BHB: I don’t French kiss girls who smoke.
N: Oh, that’s okay. I don’t plan on French-kissing you tonight anyway.

I wonder why he stopped talking to me after that.