It was a disgrace to the practice, that's what it was. Castiel thinks even without the chastity device, he might have flagged pitifully at all of that.

Sam knows how to handle him, knows how to give him the right balance of pleasure and pain, how to push him until the world clicks into place in ways it's never done before Castiel became subservient to Sam.

He shivers. "Make it last, then?"