I call nicotine an “emotional dampener.” Whatever emotion we are experiencing, we can moderate it by smoking. Smokers will want a cigarette whenever an emotion is triggered, good or bad.
I smoked for 40 years and when I quit two years ago, I was up to 3 packs a day. That’s 60 cigarettes a day for you non-smokers. Name one other thing you stop to do 60 times a day? Yes, a big component of smoking is the physical act of smoking and thus, behavior change is a big part of breaking the habit, maybe the major and most important part.
As for the nicotine addiction, I understand that the more you smoke, the more receptors are created to accomodate the nicotine but even after you stop smoking, those receptors don’t go away. This would explain why smoking tends to increase in frequency over the years and why someone like me, even after 2 years, would be back up to 3 packs a day in no time at all.
Once your receptors experience nicotine, they want more. They scream and howl for it…for about a week. Then they go to sleep. All it takes to wake them back up is one puff.
As for genetics, the addiction factor may have something to do with how many receptors you’re born with and/or how much acetylcholine your body produces naturally. If your receptors are usually busy, they won’t absorb the nicotine.
As for the OP, sounds like nicotine found some empty receptors to occupy so those receptors are asking for more of that good stuff! Don’t listen. Take a few deep breaths instead. That seems to ease the craving. Within a week, smoking should be a distant memory.
For an ex-smoker, there will always be “a good time for a cigarette” moments. This is memory kicking in - they become more like flashes, not cravings. It’s funny however, how we always know when those moments are.