I'm assuming this is for a girl you like, I haven't bothered to read the posts. Don't bother, she won't stop unless it's off her own accord. Ask her why she's doing it in the first place would be the best place to start.
You can't really force someone to stop, talk to them about how you're concerned for them etc, but they'll need to stop themselves.
Pessimist. Offer her oral sex and some chewing gum, then when you run out of chewing gum, kick ass. It's that simple.
If a girl smokes... thats a good thing son... 1. If She Smokes She Pokes and 2. All the badasses that have ever existed smoked (Steve McQueen, John Wayne, Me , etc....) Just date her anyway, if she sees it bothers you she'll stop.
get her box of cigerets and put a small bit of CCl3NO2 in each cigeret and when she start to show the symtoms tell her that shes probably ilergic to somthing in them and then she will have no other option but to stop ..................WARNING:to much CCl3NO2 could result in brain damage and/or loss of life.
She is trying to stop now. I gave her some Stride gum, I asked the arabian guy at my corner store and he just said yes so this is good stuff.
Brainwash her! Make a video of a robot saying "Smoking kills! Stop smoking" Tie her up in a chair and make her watch it. 10-24 hours recommended.
"Say" that she would, easier said than done. If I saw her smoking idk what I would do, well besides the obvious beating.