I don't if this is the same thing, and I don't even really fully understand it and why I do it. But sometimes when I'm angry, I imagine killing myself, which I know it sounds bad. It's not just that I imagine, killing myself, but I imagine killing myself in a specific way, and whenever I do, I would feel my anger reducing. it doesn't go completely away, but it's less. I would imagine killing myself by taking a knife and just stabbing myself, like in my chest, and how much blood would be there, and how my anger would just be flowing out with the blood. After thinking about it, I just feel a bit lighter, or less stressed or angry. The thing is that I don't want to kill myself. I do have suicidal thoughts, but thoughts are different from having a plan and acting on it. Plus, even if I were to kill myself, I would never actually do it in that way because it would just be too messy and I would feel bad for who ever found me after. I mean I know that the person who would find me would at least be shocked no matter the way I actually killed myself because they are looking at a dead body. But I think to find a dead body surrounded in blood would be much worse.
I didn't actually answer your question. It's just that when I read your post, it reminded me of this. I did mention this to my T today though and she said she would talk about it next week.
I don't know, but maybe it's a form of self-harm or something like that. It reminds me of when people cut or hit themselves. Because doing it is harmful to you, but at the same time it is serving some sort of beneficial purpose, by making you feel better. To me it just seems like you reading of others' suffering is maybe the same thing, just that it's not an obvious or physical form of self-harm.