I have never, ever had the desire to smoke. Fortunately, my parents didn't smoke, so I didn't grow up around it. (My mom would throw up just riding in her grandfather's car, because of the residual smoke in the cushions and my grandmother on my dad's side caught his younger brother smoking a cigar with a friend when they were 8, so forced them to finish it and when they did, they both got really sick, which prevented my dad from ever wanting to try.)
I used to say I was 'allergic' to cigarette smoke, until some oh-so-helpful person (not!) informed me (rather sanctimoniously, I might add) that it is not possible to be allergic to cigarette smoke, that such-and-such has to happen for it to be classified as an allergic reaction. I maintain, however, that I am allergic -- if I'm around cigarette smoke, I get a headache almost immediately, and if I'm around it very long, I get sick.
Oh, and I wanted to reply to what LabRat said about getting used to Stuart coming home smokey -- smoke from fires is *entirely* different from cigarette smoke. I should know, I come from a family of pyromaniacs. <g> (Don't worry, Lab, we do it safely.) We have a fire in the fireplace from about October through May, we have candles all year round, and my brother juggles torches. None of those kinds of smoke bother me in the least.
Bethy