Castiel sits up a little more at that, shifting closer to Sam, and Balthazar laughs.

"You've got an interest in bees. This is going to be very interesting."

And indeed, once he gets going, it seems Castiel has a lot to say about bees. He talks to Sam about their current situation, about the aforementioned social structures. About something he's obviously very interested in. It's perhaps a bit bizarre in terms of things to talk to somebody about when you're naked in their lap - but Castiel isn't a very conventional kind of person.