thinking about ... pausing in the middle of fucking ryland to grab his pen to write some scientific revelation on his chest/arm, ignoring his little whines for attention, and just saying to send that to you later. then continuing on.
maybe you're making him tell you about his astrophage research in the middle, questioning all his conclusions so he has to defend them while actively falling apart. he's letting out some grunts here and there, but he's determined to give you the right answers. then, once you suddenly stop, he has to force his eyes open and thinks he got something wrong. he tries to remember what he just said, but gets distracted very quickly by the sudden writing right below his nipple.
he just stumbles over his words and, yet, tries not to squirm, because he can admit it's nice to be used in this weird way, then goes right back to answering your fuel and biology questions with cute little moans inbetween when you throw away the pen.













