"You can best thank me by not getting so lost in your head again that you think you can't talk to me." Sam leans over, pressing a kiss to Castiel's upper arm. Not his shoulder, that would be painful. And not very tasty for Sam himself. "I mean it, Cas. We're in this together and there's nothing you could say that would make me love you less. But if you feel the need to be punished, there are better ways to do it."