After Cas left, Dean noticed Sam was still pouting. "What's your problem?" he asked.
"How do you even get an inside joke with an angel? Thought they didn't 'get' humor."
Dean shrugged. "Cas is different, I guess. More human."
"You can't have a joke with someone who doesn't laugh!"
Dean squinted. "Are you jealous?"
"What? No. Go have your dumb jokes with your angle friend."
"Aw, you are jealous. It's okay, Sammy, I'll always save my best jokes for you."
Sam rolled his eyes. "Whatever."
"Hey, why did the chicken cross the road?"
Sam threw a pillow at Dean's face.