Tbh I do think Elias would also be into somnophilia because on the one hand. Complete and utter control. Using another person as you please without them even being aware of it. He can decide the pace. What happens, what doesn’t, and when. I’m sure he’d have a wonderful time if Jon (c’mon. who else) ceded that to him. Let Elias do whatever he pleased in the dark of night. A surrender and show of trust.

But honestly I think he’d get Even Hornier about it the other way around. I think the idea of having so little control over a situation like that would… unsettle him enough that he’d almost never be willing to allow it, but there’d also be that dark, gnawing sort of appeal. What if someone else was using his body (oh and I’m sure there’s a lot to chew on with that alone but I am too tired to do so rn…), if he was helpless before someone else, and he didn’t even know it. Blind and ignorant to what was happening to his own body. Especially with Jon, who could become so dangerous to him. I wonder if he’s ever thought about Jon compelling him while he slept. I’m sure it doesn’t work like that, but perhaps he’s thought about it, words pulled from his sleeping lips, Jon violating his mind and body without him being at all aware, fantasized about it while stroking his cock. And for his son to be so bold, to help himself to his father’s sleeping form, curious and invasive… choosing to take whatever he wants because he thinks he won’t be caught, that he can avoid the consequences.

(Until, of course, he starts to fill out, to swell with his father’s child. So impulsive and reckless, letting his dad cum inside, not thinking about anything beyond his own pleasure, his burning curiosity)