Dean is the kind of guy who would not bring a jacket on a hunt even though Sam and Cas told him to, and then he'd either complain about being cold, or he'd be a stubborn assbutt and insist that Cas and Sam are being overdramatic and it's not cold. And he says this while his teeth are chattering.
Cas is like "Dean, your temperature is dropping drastically. I will share my body heat with you."
Dean fucking snorts and is like "Jeez Cas, at least buy me a drink first."
Cas tilts his head and tells Dean there's nowhere close by to get him a drink and asks Sam if that's a human thing, and Sam is thinking "At least they remembered I'm also here."
Nah, Dean "I never wear shorts, and a jacket is my UNIFORM" Winchester would never forget his jacket on a hunt. Gonna wax pedantic here too, because it would also leave Dean without pockets to store weapons and equipment, and his arms more vulnerable to bites and cuts and claws. He ain't that dumb. But the true hallmark of a shitpost is relegating Sam to third wheel. ;)
