John leans back a little, one hand dropping to toy with Martin's collar. In no apparent hurry, he draws the collar aside and then lets it settle back, his gaze cool and assessing, as if choosing just the right spot to begin working is his sole focus. It's not all for show, either. He has played things quite safe on prior occasions, making sure that any marks he leaves behind will be fully hidden by whatever shirt Martin might choose to wear. Now, he's thinking of flirting a bit more with the border where something might just get spotted, from the right angle, if Martin isn't careful. Nothing too risky — one embarrassing week at the office was enough — but something just risky enough to make life interesting.

The corners of his mouth curl upward once he's chosen a spot, and he tugs Martin's collar well out of the way, so he'll have plenty of room to work. "Right," he murmurs, before leaning in to blaze a slow trail down Martin's neck, his fingers still twisted around Martin's hair in implicit readiness. He pauses to suck gently at his pulse point, testing as much as teasing. He's not sure how well Martin will be able to keep his hands still without physical assistance, and he may as well get a sense of it now, before he really needs to focus elsewhere.