Attention to his scar always makes him shudder, and this is no exception - but when his head is tilted the other way, when Georg's mouth is suddenly on him, his response is LOUD, hips writing in a short grind he can't stop.

He tilts his head as far as it will go, giving him even more access, inviting him in - more quiet ways of showing that he wants more, he's ready for it, he needs it.