I agree, DC. Since you can't smoke in the house or the office, one of the few places I still smoke is when I'm alone in my car. When I'm alone in my car, I feel an overwhelming urge to light up, even if I'm only running to the post office. Weirdest is when I finish one, run into the bank, take care of business, and then get back in the car. I may have finished one only 5 minutes before, but the habit is telling me to have another. Then, I can go three or four hours at work without wanting one. So much of the dependence is psychological.

Edit: How ironic! When I pressed submit for this post, the ad at the bottom of the page was for Nicorette! Is Big Brother watching??