Pay no mind to the short, cranky Time Lord that has decided that Ten's shoulder is his personal chew toy. Affectionately. Sort of. - @master-koschei
He hardly seems to notice, his attention almost completely fixated on the sonic screwdriver in his hand. Brainy Specs on, brow furrowed in concentration, he is focused intently on the settings update, his long, deft fingers weaving over the tiny, intricate inner workings of his favorite tool. Well. Second favorite. Not ever a close second, really, but still! And it isn't as if having Koschei in his lap, wrapped around him like a baby koala, irritably gnawing on his shoulder is making the task any easier. But the double-heartbeat pounding against his chest is grounding. Intensely satisfying. Home in a way only the TARDIS has ever been -- only this is external, and solid, and loves him back in a way that feels-
"OUCH! You know there are nerve endings in that shoulder," The Doctor whines, wincing and turning to the older timelord with an expression half reproachful, half exasperated affection. "If you're not going to let me work, you could at least do me the courtesy of telling me what's the matter..."