[ Castiel turns his head to look incredulously at Dean and lets out a laugh. Sex is meaningless to him anymore, never really had a meaning to begin with. He started doing it for the same reason he started drugs. It's an outlet, a way to forget. ]

Oh you indulge, sure, but its just cleaning out the pipes, as you would say. When was the last time you enjoyed yourself? Honestly lost yourself to it?

[ It's hard to discuss sex and not think of Dean in the throws of passion, panting and flushed with arousal. It's something, if he's honest with himself, he's thought of before. If Cas lets his gaze wander down Dean's chest for a moment before darting back up to his eyes, well that's his business. ]