It doesn't bother me. My boyfriend smokes cigarettes. The only thing I have against it is that it's bad for his health, and I really care him and want him to live a long time. But I feel like I'd be a hypocrite if I asked him to stop, because I smoke pot every once in awhile.
To me, it is a real turn off. I've grown up with family members who always smoke and it's so disgusting especially to see what they look like after years of doing it, their face begins to change and their teeth begin to fall out, rot, and or turn yellow. It's the same way for drinking alcohol and doing any type of drugs, except medication. Just personally, I do not like it and I am glad my boyfriend does not do any of these things.