Unless you are a smoker who has tried and failed to stop, I don’t think you can really appreciate how demoralizing “quit attempts” can be.

I had my first cigarette at the age of 15. I smoked at least 20 cigarettes a day for 26 years. I enjoyed it, but gradually came to wish I could stop. I tried numerous methods: nicotine patches, nicotine gum, self-help books and good old “will power”—and failed every time. I nearly cracked it once, using the Nicorette Inhalator—a device [...]