Dean: we don't talk about it, cas
Cas: but please explain what fucking is
Dean: no
Cas: then show me
Sam: *eye roll* if you're gonna fuck, please do not talk about it infront of me
Cas: why no-
Dean: *drags cas out of room*
*and into bedroom*
Dean: so you wanna know what fucking is cas?
Cas: erm... yeah
Dean: then shut up and do exactly as I tell you...

Everything had gone so fast
One minute he was trying to find out what a term meg had texted him meant
The next dean had dragged him into the silence of his bedroom
Every grunt and moan rang out in the silence
Dean's toned, lick-able body was hot to the touch
Cas drank in the sight of it, flexing and writhing, not in pain as cas had seen before (and still had what an angel might call nightmares about)
But in pleasure
Cas felt the blood rush to his cock again as he remembered what he had been able to do to dean
How he had been able to make dean feel
With a simple touch in the right place
It was amazing that he had that effect on someone, that he could make them so happy

Dean stirred next to him
His breath had already slowed to its normal pace
"You ready to go again, Cas?"
Cas murmured a hoarse, grunty sort of sound
The incredible memories of Dean were fresh in his mind: the lopsided smirk when he saw Cas' naked body for the first time, the greedy grin when Cas came in his hand and the closed-eyed, open-mouthed gasp as he came inside Cas, shouting out Cas' name in his pleasure

"You're going to have to speak clearer than that" Dean replied
"Yes I am ready to go again Dean," Cas' mind was working frantically, thinking back to something he'd seen the pizza man do and had liked the look of. "But this time I'm taking control and you're going to have to beg me"
Dean started to protest (he was always in charge and it felt rather too gay to be the one being penetrated)
"No Dean" In a blink, Cas had Dean out of bed and up against the wall. He knew his angel magic irritated Dean
"Don't protest" Cas rammed Dean against the door with a single open palm on Dean's warm chest
Suddenly there was an unlocked pair off hand cuffs in Cas' hand. He let go off Dean's body to grab his hands and swiftly snap the thin, shiny cuffs closed over Dean's strong and agile wrists, before Dean even realised what he was doing
"Hey" spluttered Dean. He tried to pull his hands out but the cuffs held tight
The sight of Dean's surprise flicked a switch inside Cas. Cas knew what he wanted and now he knew how to get it. Those smooth, pale lips seemed out of place; they belonged on cas' lips.
Cas lifted Deans chin with his first two fingers. He looked into the green eyes that he had never been able to get enough of, since the first time he saw them. Castiel kissed the Dean Winchester. And the Dean Winchester tasted good.
Then Sammy walked into the room naked, like "what's up" and "I got a big cock". Dean and Cas saw this and they all banged happily ever after.