You're at the races, watching your favorite runner race. Her name is Rainbow Dash. Every day she's wearing the same outfit: Skintight black spandex shorts that go about halfway to her knees, and a dirty white T-shirt with a rainbow lightning bolt on it.

At least, you THINK it used to be white. Her shirt is so dirty it's hard to tell what color it was. This is part of why you like her so much: She looks like she hasn't bathed or changed in months. And from the way people avoid her in the race, and hold their noses when they give her her trophy, she smells like it too. As she runs you can see a visible stench emanating from her. None of the other racers run directly downwind of her, but she's so fast she's always ahead of them.

Occasionally another girl runs the race with her. She's not quite as fast but she has fun anyway. Her name is Pinkie Pie, and she looks every bit as dirty and smelly as Rainbow Dash. She is wearing short, tight jean shorts and a white and pink T-shirt. Again, you're assuming it used to be white, it's so dirty it's stained a brownish gray color. Her shorts look even dirtier, and they even have a small brown spot at the butt. It's too small for her to mess herself so you assume it's because she doesn't wipe, and you wouldn't be surprised if the same applies to Rainbow Dash, though it's hard to tell because her shorts are black. The other racers avoid the visible stench coming off her as well.

Both of them would be considered very attractive if they weren't so filthy. At least, to most people. To you, it makes you like them even more, for you have a thing for smelly girls. Which is why you always watch whichever race Rainbow Dash is in, and enjoy it even more when Pinkie is there with her.

As usual, Rainbow Dash wins the race. Pinkie places lower but she doesn't care, she's having so much fun.

...

You leave the racetrack, but turn back towards it and stare at it. You don't want Rainbow and Pinkie to get weirded out, but you'd love to get just one whiff of either of them. If you want to be really demanding, their feet, butts, or armpits. But it'll probably never happen, so you'll have to settle with their visible stench and dirty appearance as they-

"Whatchya doing?"

You jump, and as you do, a stench more foul than anything you have ever smelled enters your nostrils. You turn around, and your heart leaps again, this time with excitement. Pinkie Pie is standing right there, with a smile on her face, and as dirty and smelly as ever. Up close she looks even better. She is soaked with sweat. It suddenly occurs to you that their sweating from running so many races enhances their smell beyond what it would be if they weren't so active.

You blush. "Nothing," you say.

"It doesn't seem like nothing to me, silly! You're just itching to smell me, aren't you?"

"How did you-"

"Just a hunch." Pinkie raises her left arm and you immediately get a whiff of her stinky armpits. You inhale deeply through your nose and sigh of pleasure.

Rainbow Dash walks up to you two, and the smell intensifies. "Whoa. How are you still conscious?"

"I... don't exactly mind the way you smell," you say.

"So you have no sense of smell? Because we smell REALLY bad." She chuckles, as if she takes pride in it.

"No, I... have a thing for smelly girls." You blush. "She's fine with it."

Rainbow smiles. "I've always wanted to have someone smell me and like it. It's been one of my fantasies, but I didn't know people like you existed."

"So can we hang out?" you ask.

"You'll have to pass a little test first," says Rainbow. "We'll do it at my house. Either way I'd suggest bringing an outfit you don't mind getting dirty or stinky."

"All right, I'll go get my pajamas."

"We'll go with you, then lead you to Rainbow's house," Pinkie says.

You stand between Pinkie and Rainbow as you walk to your house. You love every second of it, as you can smell them clearly even though you're outside.

"So, how long since you last washed or changed clothes?" you ask.

"Over a year ago," says Rainbow. "One day I just decided to stop washing, and found it was really fun to smell like this."

"I started a day after she did, and I found it really fun too," says Pinkie. "And for parties, the whole ventilation system has air freshener in it. And Rarity made a dress for me that blocks the smell for other occasions."

"You should know, we fart a lot. More than the average person. We're like, REALLY gassy." Rainbow farts loudly.

Pinkie giggles. "And whenever we need to pee, we just pee in our shorts. We started a few weeks into our not-washing-and-smelling-bad time, and we really like how it feels." She farts and giggles again.

"We don't mess ourselves, but we don't wipe either," says Rainbow.

"I don't mind one bit," you say. "The dirtier, the better."

Rainbow and Pinkie smile.

Once you go inside and pick up your pajamas, Rainbow says "We'll lead the way from here. You walk behind us."

As you walk, not only are you standing directly downwind of the two smelly girls, in the center of their massive stink wave, but you get a nice view of their butts. This is the first time you've really seen them up close.

"Like the view?" Pinkie slaps her butt playfully, then she farts. PPPFFFFT!

You blush. "Y... yes."

Rainbow farts even louder. BBBRRRAAAAAAP! She looks over her shoulder at you with a smile on her face, and slaps her butt, before rubbing it a bit.

You really enjoy this.

"If you pass our test, you can give us both a butt massage," says Rainbow. "And sniff our rear ends up close."

Pinkie squeals with excitement and wets her shorts.

"Don't get too excited, Pinkie," says Rainbow, slapping Pinkie's butt. "Anon hasn't passed the test yet."

"Oopsie." Pinkie giggles.

You hope you do pass this test, for you're really excited to give them a butt massage as well.

Eventually you reach Rainbow's house and enter. You go into the bathroom and change into your pajamas, then walk over to Rainbow and Pinkie as they stand side by side.

"Here is your test," says Rainbow. "You have to smell our armpits for 30 seconds. If you look even the slightest bit green or nauseated, let alone vomit or faint, you fail."

"Is that all? I know I'm gonna pass, then."

Rainbow smiles at your confidence, then she and Pinkie raise their arms closest to each other. Already you can smell their armpits, which smell several times worse than the rest of them, except, you're sure, their feet and butts. You put your face as close to their armpits as possible and sniff deeply.

Just as you exhale in a sigh of pleasure, Rainbow suddenly grabs you with her other hand and forces your face into their armpits. You don't mind one bit. You keep breathing in through your nose, savoring the pungent odor.

Even after Rainbow releases you, you continue to stand there sniffing her and Pinkie's armpits.

After over a minute, Rainbow says "All right, I think that's enough." She and Pinkie step backward slightly and lower their arms, smiling.

"Did I pass?" you ask.

"With 120%!" Rainbow says. "If you love the way our armpits smell, there's nothing from us that you can't handle."

"Butt massage time!" Pinkie gets down on all fours, farting loudly. She giggles and pats her butt. "Now you get to do that all you want!"

Rainbow also gets down on all fours next to Pinkie. You love the way both their butts look in this position in their dirty, smelly shorts.

"I have to go to the bathroom first," Rainbow says. She sighs in relief as she pees in her stinky shorts. "Ahhhhh..."

Once she's done peeing, you rub her butt. It feels so firm. Her shorts feel very damp and dirty and grimy, though not soaking wet given the position she was in when she peed herself. You sniff her butt deeply as you rub. Her butt smells like a year's worth of body odor, farts, pee, and poop. Speaking of farts...

FFFFFFFFFRRRRRRRRRRRRT!

Rainbow sighs in relief as she unleashes a boisterous wet fart in your face. A barrage of equally loud farts, ranging in pitch and length, make their way out of her. You keep sniffing her butt as you rub, and after a particularly loud fart you slap her butt playfully, or else pat her butt lightly, before rubbing some more.

About five minutes later, Pinkie is fidgeting. "When do I get my turn?" she asks. "I have to fart REALLY bad!"

You stop rubbing Rainbow's butt, get behind Pinkie, and start rubbing her butt. Her shorts feel just as dirty, damp, and grimy as Rainbow's, and smell exactly the same. You're not sure which you like more in this state - spandex or denim.

PPPPPPFFFFFFFFFFFFRRRRRRRRRT!

You can feel this long, loud, high-pitched fart blowing against your face, and you love it. You sniff deeply before Pinkie is done farting. She sighs in relief and giggles. As you continue to caress her tushie, she lets out a flurry of short, explosive wet farts. After some of her louder farts you pat her rear end lightly or slap it playfully, then continue rubbing. She is clearly enjoying this as much as you are.

About five minutes later, a short, wet fart makes its way out of Rainbow. "Can you start rubbing my butt again?" she asks. "I can feel a big fart coming and I can't hold it much longer."

"Wait wait wait wait wait!" says Pinkie. *ppprrrrt* "Okay, now you can go."

You start rubbing Rainbow's butt again. Only a second later...

PPPPPPBBBBBBBBBBRRRRRRRRRRRRRRRT!

Rainbow sighs in relief. "Did you like that?"

You sniff deeply. "I loved it." You pat her rear end and continue rubbing and sniffing it simultaneously.

About five minutes later, you notice Pinkie looks like she's holding in an even bigger fart than last time and go back to rubbing her smelly behind.

BBBBBBBBBBBBRRRRRRRRRRRRRRRRRRRRRT!

You're amazed that such a loud, long, deep-pitched fart could come out of a girl as pretty and pink as her, even though she's equally dirty and smelly. It's stinkier than any of her farts today, too.

"Nice one, Pinkie," you say, slapping her butt.

"Did I soil myself?"

"Nope. Your shorts aren't any dirtier than when we started." You sniff. "They're probably stinkier though."

Pinkie giggles.

After about 30 minutes of going back and forth between Rainbow and Pinkie's butts, Rainbow says "That's enough for now."

"Awwww," says Pinkie. A long, wet fart makes its way out of her.

"I think you'll have just as much fun with this next part," Rainbow says. She whispers into Pinkie's ear and Pinkie giggles.

"If it's gonna be as fun as the butt massage, I'm really looking forward to it," you say.

"First let's get a snack and something to drink."

After you do this, during which Pinkie stuffs her face and drinks five cans of soda with fart powder, Rainbow lays facedown in her puddle.

"Put your face on my butt," Rainbow says. She farts loudly.

You immediately lay facedown with your face resting on Dashie's butt. You love having it right in your face as much as it being right in front of you, and you hope she's still going to fart a lot.

Then Pinkie sits on your head. Your head is now pressed between her butt and Rainbow Dash's butt, and you love it. The dirty, grimy feeling of both their shorts on your head, the smell, the feel of their tushies...

Then they both fart on you repeatedly. Their farts vary in pitch and length, but all of them are loud, wet, and smelly, though not much smellier than either of them. Through it all, they are laughing, and Pinkie seems to be kicking her legs.

You stay in this position for a while. Your best guess, at least an hour. It's hard to tell - you're enjoying this more than you can imagine. About halfway through you have to pee, but you're having so much fun right where you are that you just wet your pajamas. This makes Pinkie laugh even more.

Eventually, Pinkie stands up. "Let's have some more drinks with fart powder in them, then switch places!" she says.

"Sounds good," says Rainbow Dash. "Anon?"

"I'd definitely be up for another hour of that," you say. You smell like farts and your pajama bottoms are wet, but you're thoroughly enjoying yourself.

You drink some water while Rainbow and Pinkie drink a lot of soda with fart powder in it. Then Pinkie lays facedown in the puddle of pee. You put your face on her butt, then Rainbow sits on your head. Only a few seconds later, they fart on you some more. You hope this lasts as long as the last time. There are no words to describe the pleasure you get out of this.

At some point, after a long, high-pitched fart, Pinkie says "I gotta go potty!" From what you know about them, you know she's just having fun before she goes to the bathroom in her shorts.

"Then just go right there," says Rainbow Dash. A long, loud, boisterous wet fart makes its way out of her, then a short, wet fart.

Pinkie laughs, and you can hear a hissing sound under her as the puddle grows warmer and rapidly expands.

It must be at least another hour before Rainbow stands up. "That was really fun, but I'm ready for something else now."

You're a little disappointed it's over but you're sure your next activity will be just as fun. You get up and say "So what should we do next?"

"How would you like to go into the spare closet with us?" Pinkie asks.

"An enclosed space. I'd love that." An enclosed space with two gassy, smelly girls.

Rainbow leads you into her spare closet. The three of you enter and Pinkie closes it behind her. The closet is immediately full of their foul smell. Anyone else would have fainted. But to you it's like a sauna. You let out a sigh of pleasure as you sit down between them.

Rainbow and Pinkie both stretch their arms, and the smell in the closet intensifies from the stench of their armpits. You then get an idea.

"I smelled your armpits and your butts. How about I smell your feet?" They must really smell after running so much for a year.

Rainbow and Pinkie grin and remove their socks and shoes. You can see visible stench coming off their feet and the smell gets even more pungent. You inhale deeply through your nose and exhale in another sigh.

"Wait till you smell them up close!" says Rainbow, and she and Pinkie raise their feet so they're right next to your head. The smell is so intense you're sure no one else would even survive it. But you love every second of it. You sniff deeply, then turn your head and alternate between sniffing their feet up close.

BBBBRRRRT! Rainbow chuckles as she farts in this position. Pinkie also laughs, then lets out a loud wet fart of her own. She can barely keep from kicking her feet from laughing, as she doesn't want to kick you in the head.

You get an idea. You grab Pinkie's feet with one hand, sniff them up close, and simultaneously tickle them with the other hand. Pinkie starts to laugh uncontrollably, and you keep tickling her while smelling her feet.

"Hahahahaha! Stop! Hahahahaha! I'm gonna pee! Hahahahahahaha!"

"You just went when my face was on your butt," you say, and keep tickling her.

Pinkie laughs harder and starts peeing her stinky shorts. She doesn't stop laughing as you keep tickling her. If anything you're sure her accident makes it even more fun for her. She also farts a few times from laughing too hard, which makes her laugh even harder, and her stream grows stronger. You keep tickling and sniffing her feet for a minute after she's done peeing. She catches her breath and says "That was really fun! Let's do it again!"

"Maybe," you say. "Now it's Rainbow Dash's turn." You take Rainbow's feet in your hands the same way as Pinkie's and start tickling her. She starts laughing hard while you tickle and sniff her feet, having as much fun as she is. She farts involuntarily as you keep tickling away. Pinkie giggles with each fart, and sometimes responds with a fart of her own.

"Hahahahaha! Cut it out! Hahahaha! I'm gonna... HAHAHAHAHAHA!"

Soon Rainbow Dash is wetting herself again. Pinkie starts laughing with her. Rainbow lets out a sputtering wet fart in her puddle. As with Pinkie, you stop tickling a minute after she's done peeing.

"That... was... awesome!" says Rainbow.

"You can say that again," you say.

You sit in the closet for another hour or so, before you stand up and get out. When Pinkie opens the door, a huge cloud of visible stench comes rushing out. You sniff yourself as you step outside. You smell like Rainbow and Pinkie, but to a lesser extent.

"What do you say we watch a movie now?" Rainbow asks.

"If I can sit between you," you say.

The three of you pick out a movie you all like and put it on TV and sit on the couch, with Rainbow on your left side and Pinkie on your right side. You love sitting between these two smelly girls, especially when they keep farting. Several times during the movie, Rainbow and Pinkie stretch their arms so you can get another whiff of their armpits. You take immense pleasure in this. Both of them pee during the movie; Rainbow once, Pinkie twice.

Eventually it's time to go to bed.

"Wanna sleep in my bed tonight?" Rainbow asks.

"Do you have to ask?" you say.

You climb into the bed, with you between Rainbow and Pinkie again. All you can smell is their stench and you love it. They raise their arms, blasting you with the smell of their armpits. Eventually they fall asleep, with their arms still in a position to smell their armpits. They fart in their sleep, and only a half hour in, Pinkie wets the bed. Just under ten minutes later, you fall asleep. You dream of all the fun you had with Rainbow and Pinkie.

...

You wake up to the sound of a loud fart. You turn in the direction it came from. Pinkie is still asleep, looking like she's having a fun dream. She looks so pretty laying there, in spite of how dirty and smelly she is. You inhale deeply through your nose.

Then you hear a hissing sound emanating from her, and the wetness in the bed grows warmer and wetter. Pinkie is wetting the bed twice in one night!

She farts again, and this time Rainbow wakes up. She stretches her arms, which gives you another fine whiff of her armpits, and farts. "Good morning."

"Good morning Dashie, Anon," said Pinkie.

"Good morning to you too," you say. "Last night I was dreaming of all the fun we had."

"This definitely won't be the last time," says Rainbow. "I have to pee really badly."

"Then just go, Dashie," Pinkie says.

Rainbow chuckles, then a hissing noise is heard as she sighs in relief, and you feel her side of the bed get wetter too. She farts again before she's done peeing.

"I have to pee too," you say. "But I'm not going anywhere."

Rainbow and Pinkie grin, then tickle you until you wet yourself. You blush lightly but find it enjoyable.