The only time I have SH'd (cutting) was when I was on a buttload of pysch drugs prescribed by a psychiatrist. Literally got pissed off at what is the hamster wheel of "mental health care" in the US and dropped out -- stopped seeing doctor and stopped all the pills that were making me worse, not better (not that anyone actually listened to me). I'll be damned -- guess who stopped cutting? Yep. Me.
This was the same period of time that I first began obsessively researching ctb. Not that I had not thought about it before, just that thinking about ctb and deciding to act on ctb are two entirely different things and I had every intention of acting on it while I was under this psychiatrist's care. I was taking all those pills because EVERYBODY said it would make me better, not worse. And NOBODY LISTENED when I told them the pills were making me worse.
A white hot raging anger at being minimalized and not listened to apparently triggers the will to live in me. Ok, maybe not SI, but at the very least the obsessive drive to prove to those trying to control me that I AM smart enough to play their damn game and beat them at it.