[That's exactly like him, a mind that feels like it needs to stay awake all the time, but he's never slept next to someone he had any real emotional interest in being with.]

I'm not... well, not really. But that would have to be part of it: the ability to sleep if you chose to. If someone enjoyed it, or if it was an experience they wanted to share.

[There's something clinical and distant about his description of wanting it, or having someone who it felt good to curl up with, instead of sleep being a bodily need to get out of the way. Those things are purely hypothetical for him.]