"That's a very foul-mouthed little man you have there," Jensen observes

Lol, that one line would be worth reading the whole fic for. As it is, however, there's much more goodness to be had. ;)

I can hardly credit the way you make the dialogue sound so natural, like, "Oh, right, obviously that's the way people would talk in Santa's workshop." It's hysterical, really. And the rest of it is just plain old smile-inducing. Lovely. :D