How's he supposed to know? He shoots Cas a look back, but then Cas licks over his lips, and Dean follows the whole movement, eyes glued to his mouth. God, that was hot.

...Right. So, anyway, back in his upstairs brain. What even was that? Had he been having a sexy dream or something? Has his dry spell gone on that long?

"Have you tried eating? You're probably starving. And what the hell even happened to you to make you lose your grace?"