He doesn't see it coming, which is to say the least. When Mike jerks away, Tom is left unsteady, unsure, and utterly confused. But only for a moment, a moment just. Then Mike's come was hitting his face and it was hot and lewd and demeaning and, on his knees, Tom sat there and took it, every last drop. Which is not to say he didn't flinch - he did. It surprised him. After a moment, he opened his mouth and caught what he could. He made no noise whatsoever. On his knees with his hands bound before him, Tom laid himself bare and took the humiliation that Mike gave him, making no sound.