"Hey, Cas" Castiel flinched minutely when he heard Dean's voice. He was sitting in a meeting regarding the future politics of heaven now that God wasn't there anymore. He tried to tune out Dean's gruff voice but failed when he heard the hunter continue. "Been thinking about you" there was a pause, then Dean continued, "thinking about you when I touch my ding dong" Castiel turned bright red and began fidgeting in his seat. Dean continued talking. "I wanna do the sideways samba with you Cas. I would frick you so hard cas. And face punch your fart box" Cas was turning beat red now. "And then you can put your diddly do in my rabbit hole. Wouldn't that be nice Cas?" Castiel heard Dean moan and knew his magic wand had released the baby making cream. Cas looked down at his crotch and realize he had his own rampant erection. He excused himself to go to the Little Angel's room to go release his own white river.
FIN
A/N Um so the story behind this is I posted a head canon on instagram (if you wanna follow it's doctorsaywhatnow) that Dean might send Cas dirty prayers so one of my followers said I should write a fic for it. I suck at writing smut so this was the end game.