[The solitude, on the other hand, is how Sasuke feels he was able to do it. Having a witness to experiencing pain—he doesn't know what that would be like. Cy's emphasis on communication comes to mind here, as clear-headed as he's feeling.]

I want to try. [He's no fucking quitter.] But I can't promise how I'll respond if you're in the room with me. It's fine if I'm doing it to myself, alone.

[The onion layers of trauma continue peeling.]

I've had experiences in the past receiving pain from others. It wasn't always physical, sometimes it was in my head. When it was willing, I did it in order to make myself stronger. ... They aren't positive memories. [no shit] If we do continue now, perhaps it would be better without that element. The room is small and the walls are thin.

[Which sounds weird, but he's honestly considering that he might have a bad reaction and destroy his room. Or scream. #justuchihathings]