I'm going to light my cigarette while I'm on the sidewalk.
Why do you smoke in the first place?
It makes me feel good and I really don't care about the ill health effects.
You should care about your health. Cigarettes are really bad for you. Were you aware half of smokers die from smoking-related illnesses?
I don't give a shit. I really don't.
I can't control your habits, so my last piece of advice is please be cautious about smoking around others. It's wrong to harm the health of others because of your habits.