“An addiction is anything you can’t stop doing?” 

I said that.  Gong.  Buzz.  I’m off the show, back to Texas.  What about eating, doc?  What about breathing?

Revision:  Is an addiction anything you can’t stop doing EVEN WHEN IT’S BECOME SELF DESTRUCTIVE.  Okay, now even eating can fit that one.  Not breathing though. 

Ahhhh . . .