RockStarPeach

I think this is the most straight up pwp I've ever written, but hey, sometimes you need a little of that, right? :)

Title: Size Matters
Pairing: Sam/Dean
Word count: 3400
Rating: Adult
Summary: Dean is well endowed. Sam gets off on it. Hard. Seriously, that’s all this is.
A/N: Based on the blindfold_spn prompt Just because Sam is taller doesn't mean he's, well, proportionate. In this department, Dean is definitely the big brother. And Sam loves it. Nuzzling and putting his face against Dean's huge cock, cock worship, kneeling there kissing it while he opens and lubes himself slowly, just waiting for Dean to fuck him. Bonus points for Dean mocking Sam for his less than proportionate endowment while he fucks him into the mattress, and Sam getting off on the humiliation.


***

Dean has a huge cock. Seriously, it’s so big that Sam was actually a little nervous the first time he saw it up close. Like, butterflies-in-his-stomach nervous the first time it was pressed right to his face, all long and thick and red-tipped, dripping pre-come from the wide slit as Dean used the wetness to paint Sam’s lips.

Floor-dropped-out-from-under-him nervous the first time Dean flipped him over and propped him up on his hands and knees and nudged his hole with the swollen, rounded head.

Those nerves hadn’t lasted long though, only long enough for Dean to turn Sam to jelly with his tongue, work him open with four large, slicked fingers and then slide on inside. Sam had never come so hard in his life as he did that first time and now he can’t get enough.

He gets antsy for it, twitchy after a hunt when they’re in the car on the way back to their room, or when they’re kicking back having a beer and Dean’s legs are splayed wide in his chair, outline of his cock prominent and distinctive even though he’s not even a little bit hard.

He has to press down against his own growing erection when he sees Dean’s reaction to a hot waitress or when a girl walks by in a short skirt and he has to bite his lip so he doesn’t moan out loud when it’s Sam’s ass that Dean’s checking out after he makes an awesome shot to hustle five hundred bucks out of some wannabe pool shark.

The mornings are the worst though, when he’s awake first and has to just sit there and watch Dean sleep, sometimes for hours. Dean’s almost always sporting wood throughout the last stages of his slumber and sometimes Sam’s mouth actually waters when he sees it, pushing up from between his legs like a fucking tree branch, tenting the front of his boxers and pulling the material taut.

Like now.

The flimsy grey cotton barely contains the monster underneath as Dean lies flat on his back, elbows bent and hands shoved underneath his pillow, behind his head. One knee is bent, foot resting against the calf of his other leg and his blankets are tossed aside, giving Sam a perfect view as Dean’s cockhead peaks out over the waistband.

Dean’s not aroused, not really. It’s all just reflex, dreams and physical reactions and his body doing what it does, without any stimulation at all. He’s not as big as he’ll get when he’s fully hard, he’s not leaking yet, not angry and purple with need and already Sam shivers with arousal and the tiniest bit of trepidation.

It always hurts going in, no matter how much lube they use or how much they’ve worked Sam open but that pain is half the pleasure now and Sam needs it.

He breathes out slowly and licks his lips, gets up from the table and makes his way to the bed, sits down next to Dean and Dean must feel the dip of the mattress next to him. He grumbles in his sleep and shifts his body a little so his hips push up and to the side, boxers slipping lower and the whole head of his cock is free now, exposed, all for Sam.

He wants to lick it, suck it, choke on it. He wants to take it in his hands, wrap his fingers around it and he wants it inside him, wants that perfect, enormous piece of his brother pounding him so hard and deep he can taste it.

And really, there’s no point in not taking what he wants, because Dean is always more than happy to let him.

He reaches out and gently hooks both his index fingers into the sides of Dean’s underwear, slowly works them down over his hips. He doesn’t want to wake Dean, not yet, but that’s not the only reason he goes slow. It’s a tease for him, revealing Dean’s cock to his hungry eyes bit by bit, so long, so thick and it’s growing slightly as the elastic brushes across it. It’s not enough to wake Dean, but clearly the stimulation is enough to arouse.

Good. The bigger the better, as far as Sam’s concerned. And Sam’s had cock before Dean. Not much, true, but he’s been up close and personal with at least a few and Dean is by far the biggest he’s ever seen. Bigger even than Sam, who is nothing to sneeze at, thank you very much, but given their respective sizes in every other aspect it was a little surprising.

In a good way.

Sam stops when Dean’s cock is fully exposed, pauses to take in a shaky breath as he bends slightly, smell of Dean’s musk and sweat filling him up and making him light headed. He carefully works the elastic under Dean’s balls to hold it in place and crawls over top of Dean, between his legs and Sam opens his mouth. He salivates as he tilts his head down and takes Dean in about half-way (as far as he can manage on the first try, because Dean’s so big he won’t fit, not until he’s wet enough to slide, not until Sam’s throat relaxes a little) and he pushes his tongue up and sucks, hard.

Dean jerks under him, his body goes rigid and Sam holds his hips down when Dean jackknifes, sits up straight and fast, eyes wild and immediately reaching for his knife. Sam smirks around him and keeps on sucking.

“Jesus fuck,” Dean breathes out, and Sam can feel his heart beat, the push of his blood rapid and erratic through his body. “Scared the shit out of me, Sammy.”

Sam still doesn’t say anything, draws his face back to lick around Dean’s slit, tongue pushing inside as he wraps one hand around Dean’s shaft, warm and heavy in his hand as he jacks it. He’s rewarded with a sharp burst of flavour, bitter and strong and Sam moans, his own cock pulsing between his naked legs as he starts to drool, saliva slipping from his mouth and out over Dean.

“Mmmm,” Dean responds with a low moan of his own, lies back down and spreads his legs further to make room for Sam. “But I’m getting over it. Don’t stop on my account.”

Not that Sam has any intention of stopping, and Dean knows that. Sam closes his eyes, works himself inch by inch down further on Dean’s length, lets his spit ease the way. He doesn’t want to stop, not ever because Dean’s cock is the best thing in the entire world and Sam can’t enough of it and when Sam’s finally taken in so much that his eyes are watering and he has to fight for breath, he takes in a little more.

“Fuck,” Dean curses above him, fingers finding their way to Sam’s shoulders and curling around them, digging in. “God, you love it, don’t you?”

Stupid question. They both know the answer but Sam swallows, Dean’s shaft lodged so far down his throat that he’s on the verge of panic because he actually can’t breath anymore and then Dean eases him back, knows when just enough has turned into too much.

“Yeah, you do,” Dean answers for him, hand cupping Sam’s face, thumb rubbing over the hollow under Sam’s cheek bone to rub against his cock through Sam’s flesh. They both whimper at that and Dean sets Sam up in a steadier rhythm, not taking Dean as deep while Sam’s hand works the lower half. “Love my big, fat cock. Love how can’t even fit it in your mouth, how you try and try and your cheeks puff out and you gag on it. How your jaw hurts and your lips go numb when you suck it so hard, try to keep your mouth tight around it but you can’t because it’s just too much. Love it. Don’t you?”

Sam gives a pitiful ‘hmm’ of agreement, because yes. He does love it, loves it more than Dean even realises. For Dean it’s just dirty talk, pushes Sam’s buttons something fierce and Dean had taken a while to come around. He still doesn’t really feel comfortable with it, but he knows Sam gets off hard on it so he tries. He could still use some work, if Sam’s being honest, but Dean’s dick more than makes up for how silly he sometimes sounds, so it’s all good.

But Dean doesn’t know, has no idea that the things he says are as true as they are.

Sam slows his movements down, pulls back to lick around Dean’s head and his fingers curl into Dean’s hips when Dean gasps above him, lets out a string of happy sounding noises while Sam’s tongue dances, slides and worships. He tilts his head to the side, pulls in a few deep lungfuls of much needed air and rubs Dean’s cock along the side of his face.

Pre-come smears across his cheek, his palm cups one side of Dean’s huge shaft and the other presses up close against Sam’s cheek, heats the skin, feels so smooth, so strong as he nuzzles down the length to the base, and on the way back up Sam presses a dozen kisses along the side.

He could come just from this. Has a few times, maybe with one finger inside himself, or just a swipe of his thumb over his own prick, but that’s not what he wants this time and Dean’s getting close, he can feel it, so he pulls back all the way, sits up and reaches for the lube on the table next to the bed.

“Dude, what the…” Dean starts and when Sam looks down at him he smiles. Sam loves how into sex Dean gets, how every single thing on the planet could go right ahead and not exist anymore because all Dean cares about his Sam’s mouth on him.

“Want you inside me,” Sam explains, squirts some of the slick out onto his hand and then reaches around behind himself, pushes two fingers in without any preamble and lets out a loud groan of approval. “Need it, Dean.”

“Yeah,” Dean says and he’s almost as breathless as Sam. “Fuck, yeah. Get yourself ready for me. Use your mouth on me, suck me down and finger fuck yourself and get ready for my cock.”

Sam does. Pushes another finger in as he closes his mouth once again around Dean’s cock. He crooks his fingers, whimpers and presses his tongue up along Dean’s underside, licks a wide lick and then draws back. Three fingers isn’t enough, not really, so he goes for a fourth, wincing as it stretches a little too much but Dean puts a hand on the back of his head, feeds his dick into Sam’s mouth gently, just the top half, in and out and after a little while Sam’s so dizzy with lust, lips numb and drooling everywhere and he needs Dean inside him so bad he doesn’t even care about the burn.

“On your back,” Dean tells him, when Sam is very obviously vibrating, tense and verging on uncomfortable with desire. “Gonna give you what you need, Sam.”

He helps Sam off him, steadies Sam as his legs threaten to give out on him and Dean pushes him down with his head on the pillow. He slips between Sam’s legs, grins down at him, that stupid, goofy grin and fuck if it doesn’t turn Sam on even more.

“Ready?” Dean asks, hooking his arms under Sam’s legs and placing them over his shoulders, one at a time. “Think you can take it all at once?”

Sam can’t always. Sometimes they have to go slow. Really slow, so Sam can adjust, but this morning he wants nothing more than to be filled to bursting with one push.

“Yeah,” he says, angling down to rub Dean’s cock along his slick crack. “Yeah I can take it. Fuck, do it.”

Dean does.

Sam screams.

It’s a good scream, mostly and when Dean’s all the way in Sam feels split open, stretched so far he doesn’t think he’ll ever go back to normal. Of course he will, there’s no permanent damage, it just doesn’t feel like it at the moment.

“Okay?” Dean asks, maybe grunts and Sam grunts an affirmative in response. So Dean keeps going.

Faster and harder, Dean keeps going, hands slowly moving down Sam’s thighs, fingers kneading into the muscle to relax him and Sam can’t help bucking back down against him. Because as much as it hurts it feels fucking incredible. Dean’s inside him, thick as his fucking wrist, it feels like and so long Sam can feel the tip hitting something inside him that makes him tingle, brushes his prostate on the way there and back and drives him fucking insane.

“Dean,” Sam pants after they’ve set up a rhythm, after they’re both comfortable, settled in and Sam just needs more. One day, he might get up the nerve to ask Dean to stick a finger or two in there along with his cock, but not today. “Fuck, Dean. Touch me.”

He’d do it himself, but Sam’s hands are locked around the back of Dean’s ribs, nails digging in and creasing the skin. Besides, for some reason, Dean’s hands feel better on him than his own, even though they’re smaller. Huh. Maybe that’s how Dean feels about Sam’s cock.

Again Dean does what Sam asks, reaches down right away and squeezes Sam tight, loosens his fist and starts to pump. It’s dry at first, a bit uncomfortable until Sam’s tip starts to leak and Dean slides his palm over it, spreads the natural slick around and starts to work him again, just tight enough and not quite fast enough for him to come, not yet.

“Fuck, Dean,” Sam keens, head thrown back and his mouth opens on a silent cry when Dean pushes in extra hard. “So fucking big. Love it.”

“Yeah, I’ll bet you do,” Dean says, teasing lilt to his words even though they’re uneven and choppy. “Packin’ your load, I’m surprised you didn’t faint the first time you saw mine.”

“Dean,” Sam groans, doesn’t want to hear this but at the same time he does. This isn’t the first time Dean’s made a comment about Sam’s size. In fact, it was Sam who pointed it out in the first place, went on and on about big Dean’s cock was compared to his own while he licked Dean’s balls. He was a little embarrassed about it then, still is but in the way that turns him on like fucking crazy.

“You’re so much bigger than me, Sammy,” Dean goes on, ignoring Sam, just like he knows Sam wants. “So much bigger everywhere. Taller, heavier, more muscles, bigger hands, bigger feet… everything. Everything except where it counts.”

“Dean,” Sam says helplessly as Dean thrusts into him again and again, breaking him apart on his girth and Dean flicks his wrist, twists his thumb over the head of Sam’s cock and circles his forefinger and his thumb up under the crown. He feels inadequate, feels ashamed, except for how he doesn’t. He’s got a small dick compared to Dean, sure. But he loves Dean’s cock, loves what it does for him and for once in his life he’s completely and totally happy to let his big brother be his ‘big’ brother. He doesn’t mind being the little one here. Not as long as Dean keeps fucking him with that thing of beauty he keeps in his shorts.

“Smaller than you’d think,” Dean continues, squeezing and pulling and thrusting, bam bam bam, “given how big the rest of you is. It must be a shocker for some folks when they meet little Sammy there. Ever had any complaints?”

“Fuck you!” Sam spits, the false innocence of Dean’s tone making him angry even as he opens his legs even wider, lets Dean in deeper, so deep it hurts all over again and his eyes start to water again.

The truth is, there were a couple of times when someone had almost laughed him out of bed because of his dick. And it’s not small. It’s not, it’s just that like Dean says, Sam’s so big, people expect him to be big all over. He’s normal. Dean’s the freak.

And he knows Dean’s only saying this shit because Sam loves to hear it, loves to be teased and tormented and made to feel somehow less. He gets off on the humiliation. But Dean can never keep it up for long, no matter how much Sam wants it, because Dean loves him, loves his body and he needs to make sure Sam never forgets that.

“I love your cock,” Dean says as if on cue, lowering himself so the words come out across Sam’s lips and his fist clenches with his words. “Sam… Fuck. Love it so much.”

His hips are still thrusting, Sam’s still wincing in pleasure with his knees hooked over Dean’s shoulders and he hurts and he feels good and he loves Dean so fucking much.

“I love it because it’s not huge, like mine. I don’t even know what the fuck I’d do if you were packing like me. You’re amazing, Sammy. Fucking… all man. And so good for me.”

Dean’s thrusts are getting faster, his words coming out on more frequent gasps and hitches and Sam can’t actually form any words at all, he’s so lost in pleasure, jolts and shakes through his body so intense he feels like he’s going to lose it any second. Hopes Dean will too.

Dean jerks forward, shifts his thighs under Sam to lift him up off the bed, Sam’s ass tilted up so Dean can pound him harder. It hurts. God, everything fucking always hurts but it’s so good.

“Sam?”

“Hm.”

“Sam. Look at me.”

Sam finally does, blinks his eyes open a few times and tries to focus on Dean’s face through the haze of pleasure.

“I love your cock,” Dean tells him, jerking a few more times for good measure. “I love that I can fit it in my mouth, perfect fit, like a fuckin’ lollipop or something.”

Lollipops are small, for the most part, and though Dean means it as a compliment, he’s not much better at those than he is at dirty talking. And still Sam gets more turned on, wants Dean to lick him like he’s made of candy while Dean splits him apart like a goddamn baseball bat.

“You fit me, Sam,” Dean tells him, starts to jerk Sam in time with his thrust into his ass, not too fast but just fast enough. “Your oversized arms and your stupid long hair and your completely perfect cock. You fit me in every way.”

And that’s why they work. Neither of them is perfect, not to anyone else looking in and not even too each other, but every single thing about them compliments the other in some way, makes them happy and makes them whole.

“Sammy,” Dean croaks, speeding up and Sam just spreads himself wide, lets Dean go, pump into Sam and jack him at the same time. “Come on, Sam. So close. Fuck, I’m so close. Please.”

And Sam’s been close for a while so he lets go, relaxes and cries out, comes over Dean’s fingers and he screams again when his ass clenches down over Dean’s cock. It’s amazing, perfect and then Dean comes so hard Sam can actually feel it, enormous cock growing even wider as the come shoots through it and empties out into Sam’s ass, warm and wet and sort of gross.

“You’re amazing, Sammy,” Dean tells him, letting out a long breath and kissing Sam’s chest. “Every single fucking part of you. So amazing.”

Dean slowly pulls free, Sam winces and sucks in a hiss when his hole stretches around Dean’s head but he immediately relaxes when Dean falls down beside him and wraps his arm around Sam’s middle.

“The dick part of you’s not so bad,” Sam grumbles reluctantly, because even though Sam loved every second of it, Dean was kind of a jerk.

“You love all of me and you know it,” Dean tells him, rubbing a hand soothingly over Sam’s hip.

And yeah. Yeah, he really does.

END