I dunno. My plot bunny is turning kind of serious, with Castiel admitting he didn't know why he was acting like that because he was in existence the last time his garrison nested -- which was just before the Creation of Man and the Fall of Lucifer, so the fact that he's got the nesting-bug is worrying him a lot. It means that there is going to be a NEED for more angels very soon.

And Dean takes that to mean he's been messing around with an underage angel...