I am one of those reformed smokers. I quit when I was 26 after smoking for a decade. A lot. I actually could not stand that I smoked, but I could not stop until I stopped. Anyway, 20 years later, I was being prepped for cancer surgery: bilateral mastectomy. The anesthesiologist said, "Do you smoke?" I said I quit 20 years ago. He said, "Well, I've noticed some 'emphasematic changes." What? After 20 years of quitting I had precursors to empahsema (however you spell it.) One nasty habit with multiple consequences.
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"Destiny is not a matter of chance, it is a matter of choice."

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