I used to cut and I'm not proud of it. But I noticed that evrytime I would start cutting i would all of a sudden feel very happy. It sounds fucked up but it's very true. If some shit happens to you or a loved one, the last thing you want to do is start cutting. It is very addictive. It's like a fucking drug.
It's part of the old guilt trip issue. When shit happens, I feel responsible for it all the time. When you get hurt because of it, it feels like a punishment, like you're getting what you deserve. I haven't gotten to the point of cutting (probably never will), but I've been in that mindset (i.e. if something bad happens, it's my fault and I should be hurt because of it) for a while.