I used to read obsessively as a kid. I also ate lots and lots of candy- I'd finish entire packets at one go. Went on to be an internet addict and cigarette smoker.

I think... I just never learned focus, discipline, self-control, portion-control, when to stop. I think it's a habit more than anything else. I think I've always had some "addictive" personality, but I think I could've kept it in better check if I developed habits of discipline and control- which I never really did.