I think it’s a Crime that Elias never got to use his braintorture powers on Jon. Yes him being Horny about compulsion IS fun and good. And I enjoy it! But imagine:

Jon whimpering in distress. Shaking and staring up at Elias with his big frightened eyes that are full of tears while his mind is invaded and filled with images that terrify and distress him and also turn him on maybe. Jon reaching for Elias anyway because it hurts it hurts it hurts and he’s never learned to stop seeking comfort in Elias no matter how much pain he’s caused. Elias holding him while he sobs. Imagine what would MOST upset Jon. Would leave him a sobbing wreck. How Elias would weaponize that.