Castiel yelps softly at the slap, but it has the desired effect. Of course it does. "I'm here," he breathes, though whether it's confirmation for Sam or for himself is anyone's guess.

When Sam shifts the plug and explains his intentions, Castiel shivers. So close to getting what he wants, what he needs, he feels over-sensitive already, nerve endings on fire, just waiting for Sam.

"Yes, please... I want to feel you..."