I believe, in my conspiracy-minded way, they must add something extremely addictive to the tobacco in cigarettes (not that the tobacco isn't addictive enough on its own). What is it about cigarettes that makes some smokers even get up in the middle of the night for a smoke?

Because all the cigar and pipe smokers I know, (who don't smoke cigs too) are happy enough with lighting up only once or twice a day, or even a few times a week. They don't have to have a nic-fix every half-hour or 20 minutes.

(Good thing too, since, though a cigar tastes better than a cigarette, IMO, they sure do reek. Not many folks object to the odour of pipe smoke though)