I think that's adjacency rather than dopamine specifically. Unfortunately for you the "break thing" is adjacent to "cigarette". For whatever time you did the "b

I think that's adjacency rather than dopamine specifically. Unfortunately for you the "break thing" is adjacent to "cigarette". For whatever time you did the "break thing" with a cigarette you encoded a lot of behavioral and environmental memories together. So even after the chemical addition to the nicotine fades you're still associating the desirable "break thing" aspects with a cigarette. Parallel universe you (possibly with a goatee) that did the "break thing" but never smoked during a break will want to take a break but has no association with cigarettes or smoking. Their desire for a break remains, maybe with the same strength, but with no desire for a cigarette.