Yeah, well the lack of blood to his brain might. Hard to tell.

Dean groans--actually groans--and splays a hand against Cas' chest. Male or not, the situation is making his gut twist in increasingly awesome ways. He slings his arm around Cas' waist, yanking him as close as possible and god yes, they are both enjoying this a lot, aren't they? But it can't last, if only because Dean's spine is starting to cramp. They need to relocate.

"Cas. We need--" Words, Dean. Use your words. Even when they're hard. Dean's hard. He pushes against Cas. "Move. Gotta move. Get on the bed."