It’s the way Dean’s body presses against his - so warm, so familiar - that has Sam quivering through an instant orgasm, bottom lip caught between his teeth, one leg hooked around Dean.
And Dean - he can feel his baby brother’s contractions, the way his body spasms - wonders if he was aroused the moment they started fighting. “Whoa, easy, tiger,” he says lowly, pressing against Sam’s body with a little more force.
"Dean?" Sam whispers, voice shaking.
"Who else would it be?" Dean murmurs, feeling the warmth spreading between Sam’s legs. "Considering you just came all over yourself."