Just something else addictive to tax the crappola out of.
Marijuana isn't physically addictive. I oftentimes go w/o smoking pot...the supply may be low, I have other things to do, or I'm just not interested @ the time. It doesn't bother me one bit. Out of all of the ppl I have met that use marijuana, not one person has told me that they can't go w/o it.
Now w/ cigarettes, that's a totally different story -- I can speak from personal experience on that as well. B4 I quit smoking tobacco, I couldn't go for more than 2 or 3 hrs w/o having that nicotine craving hit me again. My 4 & 1/2 month long quitting process was pure hell!