Repeat after me...I am an addict

I am an addict. Why can't I do something once, have fun, and then let it go for a while. No. Not me. If I listen to one Princess Diaries on CD, I have to listen to them all. And the whole thing as fast as possible. Then there's Veronica Mars. I practically beg to get my hands on the next disc. And fresh delicious bagels...How can I eat just one? A game of Spider? Must keep playing till I've played an even number, or have a win streak, or make up some excuse here. I am an addict. But why can't I get addicted to vegetables, or exercise, for cripes sake?