I tend to become fairly sick around smokers - my throat starts to go sour like I have a bad cold and I feel nauseated on top of that. I don't know exactly what this reaction is, but it's a large part of why I don't like going home to visit my dad and mom because they're both smokers; in the case of my mother, she's living with two smokers as well.
That being said: If you're smoking, good on you. That's your thing, you do what you do, babe. Just please if you see me starting to gag on the smell of your cigarettes, please don't get mad at me for sitting near you. It's a bus stop; I kind of have to sit here, too.