Yes, and that's why Cas follows him around like a lost little puppy, isn't it? Because he's stubbornly frustrating.

Dean looks at Cas' hand for a second before putting the bottle down. "Look, all jokes aside, if it was anybody but you I'd've probably run screaming by now. But the rules are different with you. I dunno why. I don't really get it. They just are. I just need a little time to figure my own head out, that's all."