HTML needs a <rhetorical> tag for statements like this. Your follow up posts make this clear, but just for the record: For the love of god, do not try picking up smoking and quitting! ;)
Ironically, though, I did have a friend that craved cigarettes only when he was really, really drunk. He would smoke at those times, but never wanted to smoke any other time. Lucky for him he's not an alcoholic, or he'd be in a race to see if the lung cancer or the liver disease would kill him first.
So, I thought maybe that was the nature of addiction, that it was a subtle psychological thing.
THEN, I quit smoking, and the hair-pulling, hand-wringing, eye-gouging experience that followed showed me what addiction was really like.
On the other hand, my girlfriend quit smoking the same day I did, and when she quit it was like me quitting coffee; no big deal at all.
It can take a long time for a substance to work its way out of the body, and even longer for one behavior to be replaced with another.
I recently had this thought that being easy to wean off might just be another trick played by drugs to keep us addicted. For example, I have several times weaned off coffee for a month. It was easy, too, but here I am, still drinking coffee (again). Since it is so easy to wean off it, I can just stop tomorrow, so why not have another cup today...?
Also, it seems that some schools "addiction research" only consider something a relapse if it happens after 6 months not taking the drugs. So anything below 6 months is not even considered as "weaned off".