[Keith tries to keep his breathing even all the while this happens, at first lowering his gaze to watch what his hand does, before he finds himself looking up instead, looking at him and for once finding it hard to read the expression with which Shiro's eyes focus on the task he's set himself to.
At the same time, it all kind of leaves him unable to think much anyway, from the contact, the intimacy of it, the way he feels like his heart is suddenly beating too fast. He hardly dares to move, just letting Shiro continue, the silence stretching on.]