I like the idea of Jon getting aroused from the statements. Squirming and dripping wet whenever he reads one, feeling sooo guilty and horrible but he can’t resist the urge to touch himself after every one.
Maybe it’s a natural but gradual thing that builds and builds over time. Or maybe Elias likes to slip his own arousal into Jon’s mind, feeding him little fantasies that Jon can’t help but latch onto. And of course Elias should get to catch Jon fingering himself open. Should pin him to the chair while he Watches Jon finger himself to completion as Jon squirms with humiliation and guilt and desire.