Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/12239178.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Harry_Potter_-_J._K._Rowling
  Relationship:
      Sirius_Black/James_Potter
  Character:
      Sirius_Black, James_Potter, Remus_Lupin
  Additional Tags:
      Friends_With_Benefits, Marauders'_Era, Accidental_Voyeurism, Anal_Sex,
      Oral_Sex, Barebacking, technically_underage_seeing_that_they're_in_fifth
      year, they_are_a_bit_clueless_when_it_comes_to_feelings, Plot_What_Plot/
      Porn_Without_Plot
  Stats:
      Published: 2017-10-01 Words: 2406
****** When you have nothing better to do ******
by disposableteen
Summary
     James and Sirius are best mates, and what's a better activity with
     ones best mate than causal sex? It's fun, it's less messy than a
     relationship, and you get to practise without worrying what your
     partner might thing. And there certainly won't be any feelings
     getting in the way.
Notes
     Alright, you should definitely not have sex without a condom, not
     even with your best friend. I'm just assuming that if they can both
     remove and regrow the bones in an arm, STIs aren't a big concern for
     magical society.
“Hey, wanna fuck?”
James pushes his glasses up his nose and squints at his own reflection in the
foggy mirror. His hair has a tendency to look even more like a mess after a
shower. And sadly not in the sexy, tousled way Sirius always pulls off.
Sirius himself snorts and turns around to face his best friend.
“Eloquent as ever. I bet all the ladies swoon at your feet with a vocabulary
like that. Forever the gentleman, you offer them a dashing smile and a chaste
kiss on the cheek.”
He grins at James and starts to unwrap the towel around his hips. It’s not like
they have something better to do on a sunday. Yesterday’s prank was a success,
Snivelus is still trying to get the green goo out of the greasy mop he calls
hair, and homework is  boring .
“Oh no, wait, it’s me that ladies swoon for.”
He laughs as James mutters and walks closer, only to bite down on his neck.
“Swoon? More like pass out from boredom. You could talk professor Binns into a
second death..”
He mumbles out against Sirius’ skin, and nibbles his way to his mouth to stop
whatever answer he might have gotten.
 
Sirius thinks he ought to get some credit from his friend’s future partner.
James had been a mess when it came to kissing before they started messing
around. Too much mouth and tongue and  way  too little finesse. He truly lived
up to the stereotype teenaged boy. But he had managed to teach him to slow
down, to take it easy and start small. Now James bit down gently on his lower
lip, licked over it and waited as Sirius kissed him back.
It isn’t at all like kissing a girl. Part of it is, of course, that this is
James  and not some random girl that has taken his fancy. Not that he goes
after girls completely randomly, he has standards thank you very much. No, the
difference is mainly in how he has to tilt his head back slightly to meet
James’ lips, how girls are usually softer and battles him for control over the
kiss way less often. Bossy prick. And, last but not least, girls never press a
half hard dick against his thigh.
 
“I swear I’m noticing a pattern here..” Sirius mumbles and buries his hands in
James’ hair and pulls just a little bit. “You always get yourself worked up
after quidditch practise. Having a broom between your legs got you thinking
about other things?”
As James frowns in indignation -there is nothing wrong with a healthy sexual
appetite!- Sirius spins them around and presses him up against the tiled wall.
“Sneaky bastard…” James mutters, but can’t pretend to be that upset as Sirius
sinks down onto the floor. “Oh, hell yes…”
Since when had the sight of his best mate kneeling between his legs become so
arousing? It must be because his cock knows what it’s about to recieve.
 
Sirius grins up at him with a raised eyebrow and tugs off James’ towel.
“Enjoying the view, Potter?”
He  certainly is. When you live in a dorm with three other boys you’re bound to
see their dicks on a regular basis, so he isn’t unfamiliar with Prongs’. But
even so there’s still something so  enticing  about it. It’s long and thick,
the longest of the four of them, and is almost a bit too big to fit comfortably
in his mouth. He really can’t get enough of it.
“Eh, I’ve seen worse…”
James trails off as Sirius leans in to nuzzle his crotch, and then kisses the
base of his cock. He’s only half hard so far, but it really won’t take long to
get him ready. Teenage excitement and all that.
Sirius licks his way up his cock slowly, wrapping a hand around the base when
he reaches the tip. He was surprised by how much he enjoyed the taste when he
gave his first blowjob. Licking someone’s cock doesn’t sound too appealing, but
it somehow is. There’s something about the slightly salty taste that makes him
want to keep at it for hours. Not that he’d admit it to James. Anything and
everything can be used in pranks and teasing, and he really doesn’t want his
mate to go about spreading this to the entire tower.
But it is getting hard -hah- to hide it, and he can’t keep back a pleased hum
as he slowly swallows James’ cock down, and is rewarded with a drop of precome
at the back of his tongue. Luckily, his friend is a bit preoccupied at the
moment.
 
“Shit..!” James hisses and tilts his head back.
Fooling around with your best mate obviously comes with some serious
advantages, but he never considered  this . Does it always feel this good to
have a mouth on your dick? Or is Sirius just really, really good at this? When
he ends up doing the same to Sirius he always chokes or forget to watch his
teeth. It’s possible multitasking isn’t his strong suit. Like that time he was
levitating an armchair with Peter in it and Lily walked by and-, okay. Not the
right time. It’s hard to focus when you’re close to coming a bit too fast.
“You should become a professional..” he mumbles and threads his hands into
Sirius’ hair, still a bit damp from the shower. “Jump out of cakes and make out
with strangers every day. Sounds like-” he groans “-your thing..!”
Sirius pulls off with a last lick to the tip and smiles widely.
“That’s strippers, not hookers. Did I suck your brain out through your dick?
Again?”
James just huffs and aims a small kick to his ribs before he pulls him up onto
his feet again.
“Aren’t you  cocky  for someone with precome on his lips?”
If James wasn’t focusing on locating his wand at that moment he would have
caught his best mate with a slight flush, licking the stain off his lower lip.
But alas, he has more important things to do.
“Aha!” he grins triumphantly, and now it was Sirius’ turn to be pushed back
against the wall.
Their mouths crash together once more, both of them biting and licking in a
competition for dominance, and James moves his hand down to hoist Sirius’ right
leg up towards his chest.
“This should totally count as charms practise.” he says as he summons some
lubricant onto his fingers.
 
Sirius spreads his legs the best he can and drops one hand to his cock.
Normally they’d have to fight (or bicker as  some  people in their dorm like to
call it) about who would top, but right now he really, really wants his best
friends cock inside him.
“Oh yeah, you should give professor Flitwick a presentation on the practical
everyday uses of charms.”
James just groans, even as he circles one of his fingers around his entrance.
“Dude, we have an agreement.  Never  mention teachers when we do this.”
Sirius’ retort gets lost as that first finger slowly slides inside him. They
have done this enough times to get the hang of it (thank Merlin he atleast knew
the basics of two men having sex, or they’d never have thought about using
lube), but he knows he’ll never get used to that feeling.
“Ah…” he breathes and furrows his eyebrows.
It took a few tries, but he realised it’s much easier to relax if he strokes
his cock at the same time, and now it doesn’t hurt at all as James slowly
stretches him. All there is is the feeling of  weird  and  weirdly good .
 
James’ brows are furrowed as well, but in concentration rather than pleasure.
He now knows that it’s easy to get this wrong, to do it too fast or too little,
and he really doesn’t want it to hurt. That’s pretty much the opposite of what
they’re aiming for here. So when Sirius’ head falls forward and he starts to
mouth at his neck he smiles and knows he’s gotten it right.
“Come on..” Sirius mumbles, slightly breathlessly. “Give me another one.”
James rolls his eyes but does as he’s asked, or more like demanded.
“I can’t believe you won’t shut up, even with a finger up your ass.”
Although now there’s two, and he twists them slightly to get him as loose as
possible.
“What can I say..” Sirius breathes and moves his hips in time with James’
fingers. “My intelligence is too important to be hindered by anything you do.
Although, maybe three of them would do it…”
He grins when James obliges, and has to bite down on the patch of skin between
his neck and shoulder to stifle the moan at the back of his throat. They really
have gotten a hang of this, and he’s almost disappointed when James eventually
pulls his fingers out. Almost.
James summons more lube into his palm and spreads it over his cock.
“Oh my, mr. Potter!” Sirius exclaims in his best imitation of professor
Flitwick’s voice. “What a tremendous demonstration of the lubrication charm!
Ten points to Gryffindor!”
James nearly chokes and kneels Sirius in the stomach, dangerously close to
where his hand is still stroking his hard cock.
“Fucking hell Pads,  shut up !”
But even as he says that he can’t stop laughing, even as he slowly slides his
cock inside his best friend.
They both laugh and moan in equal measures when James pulls back just a little,
and then slides all the way inside.
 
They take a moment to just breathe and get used to the intense feeling, atleast
until Sirius tires and squeezes down on the dick inside him.
“Come on, or I will come without you.”
He grins at his own joke, but it turns a bit slack jawed when James starts to
move.
It’s a bit awkward doing this standing up, with Sirius’ leg still hoisted over
James’ arm, but after a while they find a good rhythm.
“Fuck yes-...” Sirius groans when James starts to get going for real, and he
digs the nails of his free hand into James’ back. “Come on, damn you. Harder!
Or do you need help?”
Taunting James is always both fun and a good way to get results, and he moans
loudly when he finally picks up the pace.
“Yes, yes, yes, yes..!” He moans breathlessly, and his toes curl against the
tiled floor.
“Who’s eloquent now?” James asks, just a tiny bit smugly. Getting that sort of
praise is good for a man’s ego.
 
And it is at that moment that the door to the showers open, and Remus pops his
head inside.
“Sirius? Do you know where my-...”
Of all the things he has seen during his five years sharing a dorm with James
Potter and Sirius Black, of all the pranks and fights and magical accidents and
animagi , this was just about the last thing he thought he would walk in on.
“Oh, hiya Moony..!” Sirius calls out, still breathless.
Remus just stares for a solid five seconds before common decency returns to
him, and he quickly shuts the door. He can ask where the heck his favorite
sweater has gotten to later.
 
“Well, I guess he knows now” James mutters and stops to grind their hips
together.
“It was only a matter of time. It’s not as if we’ve been  subtle . I swear
Peter really should have put two and two together when he saw, you know, that
one time-”
James grimaces.
“We decided we would never talk about that! And to never use the invisibility
cloak like that again…”
Although that is a bit of a moot point, seeing as they will undoubtedly try the
exact same thing again. It  would  be really freaking hot, if no one would
surprise them like that next time.
 
James starts to pick up the pace again, and Sirius bites down on his lip. He’s
getting close now, especially when James’ cock brushes past something inside
him that he can almost feel in his entire body, and he moans loudly and strokes
his cock in time with their hips.
He comes with his head tipped back and a groan, and he feels James’ thrusts
become unsteady as he tightens down around him with his orgasm, and James moans
as well when he stutters to a stop, buried deep inside his best mate.



Sirius is in a particularly good mood as he skips through the common room
later. Sex will do that to you, he supposes. It really should be an official
tactic to battle mental health issues, politics, war… Just about anything. Sex
and alcohol. Especially together. Nothing bad could ever come out of that.
“Hello Moonbeam!” He singsongs happily and throws himself down into the couch
next to Remus, nearly making him drop the heavy book in his lap. “What did you
want to talk about earlier?”
Remus gives him an incredulous look, the one he used when Sirius said he had
never heard of Edgar Allan Poe.
“What I-, never mind. I didn’t know you and James were… You know.” He waves his
hand in the air vaguely. “You two never seemed to have that kind of
relationship. Not that I mind, of course!”
He adds the last part quickly, even though he has that furrow between his
eyebrows he gets when he’s thinking too hard about something.
“Hm?” Sirius drags his eyes away from Remus’ eyebrows. “Oh, that? Oh no! No,
no, no!”
He laughs and leans back on the couch.
“It’s not a relationship! Definitely not! We’re just, I don’t know. Passing
time. In a pleasing fashion. Besides,  someone  had to teach that boy to kiss.
Man, no wonder Marlene dumped him in third grade. Poor girl..”
Remus gives him a  look , not the Edgar Allan Poe one, but more the ‘are you
sure the months of detention is worth it’ look.
“So you’re, what. Friends with benefits?”
Sirius hums and tilts his head.
“Yeah, I suppose! That’s a good phrase for it. Is it a muggle thing? I knew
those muggles were up to something. Anyway, we’re just having fun. All the
messing around without the mess. No feelings, no one gets hurt!”
He grins, as if he himself had invented casual sex. Remus, on the other hand,
still has that look.
“Right..” he mumbles. “No one gets hurt.”
 
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