
Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/8601358.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M, Multi
  Fandom:
      Gravity_Falls
  Relationship:
      Dipper_Pines/Stanford_Pines/Stanley_Pines
  Character:
      Grunkle_Stan_|_Stanley_"Stanford"_Pines, The_Author_|_Original_Stanford
      Pines, Dipper_Pines
  Additional Tags:
      Aphrodisiacs, Science, Experiments, Frotting, Masturbation, Incest,
      handjob, Implied_Relationships
  Series:
      Part 1 of Sin,_Smut_and_Snuggles
  Stats:
      Published: 2016-11-20 Chapters: 1/? Words: 1106
****** Substance P ******
by Sin_with_a_Grin
Summary
     Stanford Fillbrick Pines is a mad scientist. Real Science demands
     trials and results. So when he finds a mysterious substance, who is
     he going to try it out on?
Notes
     SIN! Yessss sinsinsinsin. It's in the name. Not sure how many
     chapters! But there is a distinct lack of DipStan fanfic so here we
     are! Yes. I will continue with this sin until I and all my sinful
     friends run out of ideas. Yes. Enjoy.
See the end of the work for more notes
****** Trial One ******
 
8:43 pm
 
Something wasn’t right. Stanley Pines was more than able to get it up, but
unless Ford had slipped him a little blue pill…
Whatever Ford had or hadn’t done, this erection was starting to hurt. He
shifted for the umpteenth time in … “What the hell?” he said softly, staring at
the clock. How had he gotten this hard, this painfully in 3 minutes? He hadn’t
been this much of an upstart since highschool. Surely the clock was busted.
“Dipper… Dipper!” he shouted toward the door, trying to lean, squirm, cross his
legs to hide the ‘growing problem’. He’d get Dip to fix the damn clock, then
he’d send the kid on some little errand while he had his nephew’s attention.
Then after Dipper left he could take care of his not-so-little problem.
“Wh-what do you want, Grunkle Stan?” Dip stuck his head around the corner and
didn’t come in. Stan’s head tilted; was it just his imagination or did Dipper
look super uncomfortable too?

“Clock’s busted.” He tilted his chin at it on the wall, not moving his
erection-hiding hands.

Dipper’s eyes flicked to the wall and then back to Stan. “So fix it?”

Stan fought for his usual grumpy old man saltiness. “Thought I paid you to mess
with crap like that.”

Dipper’s lips twitched a little and he came in the room with his hands balled
in his pockets, walking a little funny himself and rolling his eyes,
exaggerating the teenage gesture. At 14, Dipper really reminded him of Ford
when they were 14, lanky and awkward. “You pay me exactly 25 bucks a month to
do whatever you feel is ‘within reason,’ Grunkle Stan. That’s a wide
definition.” He stands under the clock, straining on his tiptoes to reach the
thing. The motion exposes a band of skin above his shorts, and the stretched
position clearly outlines his rock hard, pubescent cock.

That can’t be a coincidence, can it?? But something muddles the old man’s
thinking. He shakes his head, trying to focus on the conversation. “You came
back though,” Stan says quietly… he finds himself standing now, coming up
behind his great nephew and reaching over the blue and white hat to grab the
clock and hand it to Dip. “Couldn’t be all that bad for you to chose to spend
your third summer here… This year without your sister, too.”

Dipper hisses in surprise when the old man leans too close, his blunt tip
almost peeking out of the fly on his thin linen pj pants when it brushes
Dipper’s low back. “Grunkle S-Stan?” He says, turning with clouded eyes,
jerking back when he reaches for the clock and brushes the thick fingers
instead.

Stan can’t even answer. He drops the stupid clock on the ground and sweeps an
arm under his great-nephew’s backside and pulls Dipper against himself,
planting a hard kiss to the shocked face. Dipper’s teenaged features freeze for
a moment before he melts, clumsily gripping at the older man’s biceps and
kissing him back with an eager, unpracticed mouth.
 
Down in the dirty basement, Ford’s mouth hangs open, pen poised above his
journal, his other hand slowly slipping towards his groin. The telltale noise
of the zipper, the creak of his chair are the only sounds to betray the
scientist’s activities; his teeth nearly break the skin of his lower lip as he
furiously strokes off to the vision on the screen in front of him, caught by
the many security cameras.
 
18 October 2016
09:08 pm
Clinical trial of alien substance going well. Today I first used the substance
on humans. In the absence of willing, observable test subjects, I have elected
to test the substance on the two males that currently reside with me.
After the first stage of testing on rats, it was discovered that the substance
seems to be a true aphrodisiac. However, it only applies to males.
Note: I will here use the phrase “true aphrodisiac” to mean two things:
    * It excites the body physically, causing an almost immediate and possibly
      painful erection for the subjects.
    * It appears to inhibit both psychological and biological factors. See
      below:
      I tested the substance on several mating pairs. I gave them a more
      standardized male sexual stimulant for the control group. This allowed
      the males to achieve erection and successfully copulate. When presented
      with a choice, the rats on (Viagra) were inclined to mate with the
      females instead of the males, both on (Viagra) and without. When I tried
      the new substance (hereafter referred to as Substance P, or SubP) on the
      same population of rats, the males chose only males. The presence of
      SubP, (Viagra) or nothing seemed to make no difference (though those male
      rats who were on Viagra seemed to be reluctant to copulate with male
      rats. If they were humans, I would use harsher wording.)
 
The first human subjects will be described here:
Subject 1: 68 year old male, approx 5’11”, 220 lbs. Overweight/approaching
obese. Medium physical fitness. Vital signs (stable enough for sex)BP 145/75,
HR 68). Length: 5.8”.  Width: 2.5”. Aerosol administration: 35,000 ppm,
released 3 times into the air ducts.
Subject 2: 14 year old male, 5’5”, 140 lbs at last physical. Trim figure, lean
muscle. Medium physical fitness. Vital signs: BP: 120/60, HR 75. Length: 3.8”.
Width: 1”. Aerosol administration: 15,000 ppm, released 2 times into the air
ducts.
 
SubP was dispersed via aerosol in the air ducts. I have sealed the ducts and
windows of the bedrooms they were in and have been closing doors to achieve
maximum inhalation of the drug (also sealed along the sides, top and bottom.)

At 8:43, subject 2 entered the same room as subject 1. Both were fully erect
and in distress. Their personalities appeared to be intact, but the drive to
achieve orgasm superseded the art of conversation and typical social
interaction/rules. By 8:45, both subjects were naked from the waist down and
frotting. Completion was reached before 8:46, a rare and uncommon advantage.
 
Hypothesis 1: SubP requires two human subjects to complete the full cycle; or
in other words, this is not a drug to be used to pleasure oneself. This proves
my prior hypothesis when I tested it on myself.
Hypothesis 2: SubP requires both human males to take the drug in order to fully
lower inhibitions. (Substantiation: Subjects were related by blood and have
never shown sexual interest in each other before the introduction of SubP)
In my next trial, I will increase the dose by two (2).
End Notes
     There may be some DipStanwich'ing soon! Ford is so clinical OMG.
     (PSST! For those of you brave enough to read Soundless Screams, this
     occurrence is Mentioned. However, that fic is NOT FOR THE FAINT OF
     HEART. Read all the warnings and stuff. Please. Seriously. But the
     Ford mentioned here is the same in both fics. )
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