I used to do a lot of SI when I was younger. I thought I had gotten over it years ago, but a while back I became obsessed with finding a method of self-performed orchiectomy. I started injecting ethanol into my testicular tissue a few milliliters at a time every other day. I tried to convince myself it was just for transition's sake, to stop steroidogenisis; but the act became very addictive. I didn't stop until the tissue became so hard I couldn't force the needle in without bruising.
I've been doing better since though, but now I'm a bit more cautious. I realized this isn't something I'll ever get over. I can stop engaging in self injurious activities, but the issue will always be beneath the surface, hibernating in the deepest parts of my self.