Back in the dim and distant days of 1976, my wife of the time wanted me to see a hypnotherapist, because I was an extremely heavy smoker -- on occasions I'd get through 60 in a day - Gauloises... In the end, I said if she set it up I'd go, mumble mumble...
The chap turned out to be a retired Army Lt Colonel. He got me relaxed, and talked... no 'trances', no swinging baubles - just a comfortable couch and talk. He suggested I stop producing the antidote that enables smokers to handle the poison that they are using, which was news to me. At the end he wanted £2 20p (Two guineas!) which he sent to a charity. Before I left he asked me if I had any cigarettes, and told me to chuck them in the bin. I have never touched one since!
It all depends on a tacit agreement between you.