I've been SI-ing forever really. Sure, until I was 15 I wasn't bright enough to cut myself but I'd been biting/brusing/chewing my fingernails til they bled ever since I could remember.
Things got pretty out of hand when I was around 17 and because of my crazy SI-ing habits I was almost put into a 'home' as they conveniently call it over here. I managed to fight back (or pretend to anyway) and stuck to ...