Smoking
According to his own accounts related to me, my grandpa started smoking when he was thirteen years old (approximately 1935). He smoked until my eldest sister was born in 1976. By then, the health detriments were well known, and he figured he probably shouldn't be smoking around his granddaughter. He never smoked while I was alive, although my Auntie Karen (his eldest daughter) still smokes to this day.

So, he smoked for 41 years of his life, and at some point in the early 2000s, he was diagnosed with COPD - Chronic Obstructive Pulmonary Disorder. My grandfather died in the summer of 2005. He was 83 years old.

If someone who smoked for 41 years of his life still lived to be 83, what harm could a couple of years (or less) do? I've decided to start smoking for a while, just for the hell of it. At least 2 of my good friends in high school smoked. I've always been drawn to it. Smoking just always seemed cool to me. Note that I'm easily swayed by advertising and some parts of popular culture (notably absent are the reality show parts of popular culture).

So, yeah, don't try to stop me. I've got an addictive personality and I'm well on my way.