Dean's busy stripping off his damp socks and crawling back into bed when Cas pipes up again and it takes him a minute to process the words.

"Cas, if I wanted something different, I'd shack up with a Leviathan, okay?" This is Dean, trying to be reassuring. "Look. I know we don't always get each other. Human angel disconnect or whatever it is. And sometimes you piss me off but good. But I've seen your 'something different' and I ain't interested in seeing it again. You just be you, alright?"