I have been smoking for almost half my life. Fifteen of my thirty one years have been spent in a haze of cigarette smoke. And i loved it. Well, at least the pleasure receptors in my brain did, what with all the extra dopamine that nicotine tricks you with.      I was well aware of the risks, of course I was. But I went with it. I was sixteen, I'd left school the year before, got a job, got a tattoo. I was all growed up.      My relationship with cigarettes since has been somewhat