Please don't get mad at me, but I'm FAR from normal and it's hard for me to understand wanting to hurt one's self. For me it's more of an urge to hurt others. So even some people who are not normal have trouble understanding this but I am certainly sympathetic and try to be understanding. Normal people wonder "why would any one want to hurt themselves? We shouldn't want to hurt any one!" And I'm like, "why would any one want to hurt themselves when we can just hurt others instead?" It's a difficult concept for a lot of people to grasp. Including some people with other PDs.