Why is it so hard to quit smoking?

Why is it so hard to quit smoking?

Smoking is a very complex human behavior. It involves a variety of aspects that trap some people much more one way than another. For example, some people; just the rituals and routines of using a cigar, a pipe, a cigarette, becomes very familiar to them. And they have a hard time breaking that. Other than habit, there is psychological dependence, the meaning you get out of it, and how it makes you feel, and what you associate with smoking. "Oh, I use a cigarette to relax.". And that's hard to change that part of the human behavior. But the real reason people can not quit smoking, when they make up their mind to stop, is because of the brain chemistry that makes you feel good when you smoke and within hours of not having a cigarette the brain chemistry changes, creating withdrawal symptoms that make someone feel miserable. Irritable, they have cravings, they're hungry, and they're fidgety. And all of those symptoms are very unpleasant for a smoker. Going on two weeks, for some people six weeks, before they really feel like they're free from that cycle of brain chemistry.