It's easier than Sam thought, really. It's easy to forget the fact that Castiel is naked in his lap when he's so animated and obviously talking about something he knows a lot about. Sam does his best to ask good questions, though every once in a while he says something just to get a flush of anger or indigence on Castiel's cheeks, though his own grin shows that he means nothing by it. Just pushing buttons to get a reaction.

No, Castiel is most definitely NOT just some bauble.