"What," Cas growls, his face against Dean's shoulder until he extracts himself and scoots back, stretching. He blinks, peering at Dean through the dark as he slowly, slowly wakes up. He's still tired and it takes his brain a minute to catch up, but then his brow narrows. "...Dean, why are you on the floor with me?" See, the reason he was on the floor was so that he wasn't next to you on the bed. You defeated the purpose of him sleeping on the floor by doing what you did. You idiot.