I did this as a teenager to an extent and then sporadically later too. I think the classic motivation is emotion regulation/expression and that probably was mostly the case for me at that time. I do think that aspect of it or role reduced as I got older and learned new coping skills.
I then stopped along with getting over my eating disorder (apparently another common means of emotion regulation) and was pleased. But then all this "stuff" (PTS) fell apart and I am very ashamed to say I am back down that road and at age 45. And I truly do not think it is as straight forward as emotion moderation at this point at all. It seems directly linked to trauma (in ways I can't speak about) and getting help/asking for help for me now. And it is extremely shame making. So in some small respects I relate to MD's pattern.
I then stopped along with getting over my eating disorder (apparently another common means of emotion regulation) and was pleased. But then all this "stuff" (PTS) fell apart and I am very ashamed to say I am back down that road and at age 45. And I truly do not think it is as straight forward as emotion moderation at this point at all. It seems directly linked to trauma (in ways I can't speak about) and getting help/asking for help for me now. And it is extremely shame making. So in some small respects I relate to MD's pattern.