Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/2321834.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Gravity_Falls
  Relationship:
      Bill_Cipher/Dipper_Pines
  Character:
      Bill_Cipher, Dipper_Pines
  Additional Tags:
      Masochist!bill, Blood, pretty_explicit, I'm_gross, Dumb_pwp
  Stats:
      Published: 2014-09-18 Words: 1277
****** The Discovery ******
by Firethekitty
Summary
     While the two are going at it, Dipper discovers that Bill likes pain
     as much as pleasure.
Notes
     My first ever explicit fanfiction oh boy.
     JinnyMoose on tumblr gave me this prompt. Go check her out, she's
     awesome.
"Can I top this time?" Dipper whispered into his boyfriend's ear after a break
from kissing. Dipper laid on top of Bill, his skinny arms draped over the
other's neck.
"Of course you can, Pine Tree," Bill replied, arousal fogging his mind as he
continued smooching his partner all over. Dipper giggled, brushing his soft
lips against Bill's neck and sucking gently on his earlobe.
After hearing Bill's light groans of pleasure, the boy started nibbling a bit.
He was very new at being dominate, so mistakes were bound to occur.
He accidentally bit into Bill with one of his canines, immediately drawing away
from his work. A small droplet of blood instantly fell from his open wound,
dripping onto his shoulder. Bill hissed at first, but let out a slight moan at
the lingering jolts of pain on his ear.
"Oh gosh Bill, I'm so sorry," Dipper cried, immediately searching for something
to clean it.
"Pine Tree it's-" Bill tried to speak, but Dipper was already up and finding
some clean cloths.
Bill sat in silence on the bed, his shorts tighter than ever before. He grew
restless, fighting the urge to jack it off right then and there. Why did that
bite feel so good to Bill? He was about to test something when Dipper came back
into the room. The boy hoped onto the bed, wiping up the blood from his
shoulder and ear.
"Oh Jeez Bill, I'm so sorry please forgive me I-" Dipper blurted, desperately
scrubbing even the slightest red tint from the other's body.
"Dipper, Dipper, it's okay," Bill said with a chuckle, comforting the boy with
his large hands. "It's fine. It actually felt kind of good," he soothed,
cheerfully stroking his scruffy brown hair.
"It felt good?" Dipper asked, staring into his bright blue eye. "It hurt at
first, and then it, uh.." Bill glanced down, slowly grinding his hips against
Dipper's backside uncomfortably. The boy felt a very impressively-sized, rock
hard bulge under him. He blushed, shifting down to the other's pelvis. He
pulled Bill's shorts down a bit to reveal his very thick member.
Dipper absolutely loved it. It had a slight bend downwards, which brushed past
that 'special spot' with every thrust. Dipper took his entire cock into his
mouth, quite used to the size. He was a pro at making Bill moan and groan
unintentionally loud. He swirled his tiny tongue around the shaft as the rest
of him was in his mouth.
Pure bliss surged through Bill's entire body, his tongue lolling about and eyes
fluttering closed.
"My God, Pine Tree..." He groaned, reaching down with his lanky arms to pet the
boy's hair. Dipper's shorts were growing tight, his hand snaking downwards.
Bill suddenly remembered that Dipper wanted to top today.
"Wait," he said when he got his breath back. Dipper looked up at him with his
big brown eyes. "Let me do the work," he said, leaning up and laying Dipper
down onto his back.
"O-oh, 'kay," Dipper whispered, allowing Bill to pull off his shorts and
underwear. The boy didn't normally get blowjobs since Bill was often the
dominate. Dipper was also insecure about his size, but it really was quite
average. Bill immediately got to work, running up the boy's shaft with his long
tongue. Dipper covered his mouth to avoid making some very adorable and very
unintentional groans. Bill giggled and ran his rough hands up the other's
stomach, flicking the tiny pink buds on his chest.
"Make as much noise as you want to, babe," Bill said when he freed his mouth.
He flicked his tongue along Dipper's sensitive head.
"At t-this rate I won't last long," he mumbled, as red as a beet. Bill smiled,
reaching for a condom on the night table. He handed it to Dipper before he spun
around, very impatient to start. Dipper rolled the condom on, spurt on quite a
bit of lube, and looked over at his partner. He was laying down with his
backside up, presenting himself to the other. Dipper's breath hitched, his face
incredibly red and his member throbbing with excitement.
"Come and get me, big boy," Bill said seductively, rocking his hips back and
forth.
Dipper couldn't help but laugh, but shushed up when he looked into Bill's blue
eye. It was shining with absolute lust, so eager to have the boy inside of him.
Dipper took a deep breath and positioned himself in front of Bill's entrance.
He slowly slid himself in, gasping at the tightness. He slipped all the way in,
waiting for Bill's approval.
"Alright Dips," Bill breathed, his own member still very hard. Dipper pulled
out to the tip, and slid back in. He started up a nice and slow pace, grabbing
onto the other's slender hips. His thrusting quickened and he absentmindedly
dug his nails deep into Bill's back. He let out a yelp, looking back at the
boy.
"Oh God, I'm so sorry, why do I keep doing this?!" Dipper said, frantically
rubbing the marks as if it would heal them.
"Pine Tree... C-could you do that again?" Bill groaned, grabbing at the bed's
pillows.
"Are you sure?" Dipper asked, surprised. Bill nodded vigorously, backing up his
hips into his partner's. Dipper hesitantly reached down and dug his nails back
into Bill. Pain shot through Bill's body, making him call out in pleasure. He
arched his back, moaning loudly as Dipper ran his nails down deeper into his
skin.
"Ah.. Fuck," he groaned, biting down onto the pillow. Dipper started up his
thrusting again, trying out different types of pain for his boyfriend. He
spanked his backside and pulled on his scraggly blonde hair. His ear and back
were aching, the new sensation driving him wild. Every thrust and every pinch
of pain sent him closer and closer to to the edge. Dipper bent down and licked
the un-wounded earlobe, pulling on it gently with his teeth.
"That's it, keep going," Bill whispered, tilting his head so Dipper could get a
better angle at his ear. Dipper then bit down, sinking both of his canines deep
into the flesh. They pierced the skin, sending a very sharp pain into Bill. He
cried out, turning into a trembling and drooling mess beneath Dipper. Bill's
entire body shivered, gasping as he came. Dipper let go of his wounded ear,
blood spilling out onto the pillow he was biting. The boy gave a few more
thrusts into him until he came as well, grabbing onto Bill's sides tightly. He
pulled out, panting hard. He reached for the cloth on the night table, handing
it to the other before rolling off the condom.
"Goddamn Pine Tree, that was.." Bill breathed, wiping up his own blood. All of
his other wounds still ached, making him feel a bit weak. "Awesome, you were
awesome," he finished, laying on his back and lazily dropping the bloodied
cloth onto the ground below the bed. He suddenly felt very tired as his new cut
stopped bleeding. Dipper crawled up onto his bare chest, heart still racing.
"Thanks," he whispered back, smiling and wrapping his arms around his neck. He
lifted his head up and kissed him passionately on the lips, twirling his blonde
hair around in his fingers. Bill held Dipper to himself with his large hands,
soothingly rubbing his back.
The two laid in a comfortable silence, occasionally pecking each other on the
lips or cheek.
"You liked that, huh?" Dipper asked quietly, feeling quite tired.
"Oh yeah," Bill responded, eyes fluttering closed. Dipper got comfy on the
other and quickly dozed off. They'd definitely be doing that again.
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