Is it unreasonable to expect a partner to stop smoking because you don't like it?

I recently got with a new partner (having come out of an 8 year relationship). My new partner smokes. I've never been with a smoker before, I want him to stop because it's unhealthy for him, unhealthy for me and it's simply expensive and disgusting. It worries me about the effect it has on his health, but he thinks this is unreasonable? Thoughts!!!!

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