Dean frowned a little as he looked at Sam, listening to him but not wanting to. He didn't want to hear talk like that, because being outright told he couldn't look after Sam was one of the worst things he'd heard, repeatedly throughout his life.
"I can kiss you however I want, just go to sleep, I'm not talkin' about this, Sammy. You're gonna just have to put up with the fact I'm gonna watch out for you no matter what these stupid trials are." He would just have to follow him around and fuss, if it came to it.