Cigarettes reduce stress: busting the myth.
It's all about self-suggestion. Smoker is aware of the fact that cigarettes are harmful, but at the same time he is craving for them. That's why he starts making arguments for smoking.
So, we need a cigarette as we used to it and as tobacco is actually a drug. If there is no cigarette at the moment, we become nervous. Getting a cig, the smoker becomes tranquil at once. People go on smoking without being aware that they can just stop and quit.
Smokers don't make decisions by themselves to smoke one or two packs per day. The reason is craving for a cigarette. Ask any old-time smoker if he's ok about the fact of smoking for so long and if he'd like to quit. Most probably 98% will say they suffer and just can't imagine their life without cigarettes.
Today there are many ways to quit smoking but they all come to the same thing: first of all one should be psychologically prepared to this step.