You've been going out with Fluttershy for a few weeks now. It took a while for her to tell you how she feels about you, and you return the affection. What's not to like about her? She's both kind and beautiful. She's also shy and timid but she loves being with you. Despite her shyness she likes buttplay, and was the first to suggest that you slap or rub her behind. You like this so much you're not even disappointed that Fluttershy will likely never satisfy your other two fetishes. Besides, you don't want her to do anything she's uncomfortable with. She's so graceful and demure that sometimes you even suspect she's fundamentally incapable of farting.

One summer day, Fluttershy decides to go on a camping trip in a forest full of friendly animals, as well as fruit that she can eat, and a clean spring from which she can drink. You see her off before she leaves.

"Have fun on your camping trip, Fluttershy," you say.

"Are you sure you don't want to come too?" she asks. She is wearing a white tank top and a short skintight pair of green spandex shorts.

"Nah, I'm good, plus I have a few things to do this week. I'll see you when you get back."

You hug and kiss, then Fluttershy walks away with her bag of camping supplies. You stare at her butt for as long as you can. It looks so sexy in those skintight shorts. And you know she doesn't mind.

...

A week later, you hear a knock on your door. You open it. Fluttershy stands there, in the same outfit you last saw her in. She looks quite dirty, her hair is messy, and she smells rather unpleasant. Your heart leaps with excitement at this. "Hi Fluttershy," you say. "How was your camping trip?"

"It was really fun," she says. "There were all kinds of bunnies and birds and squirrels and raccoons and deer and butterflies. Some of them even snuggled close to me when I slept."

"I'm glad you had fun."

She sniffs her armpit and recoils slightly. "I'm so sorry about the smell. There weren't any baths or showers there, and I didn't really want to take a bath in the spring or the animals' drinking water. I didn't bring a sleeping bag so I slept in the dirt." She blushes lightly. "But I did bring hand wipes, and... the leaves made a good replacement for toilet paper. It did rain once, but only on the second day."

"Don't worry, Fluttershy. I love you no matter how dirty and smelly you are. In fact..." It's your turn to blush.

"Yes?"

"Promise you won't be offended or weirded out?"

"I promise."

"I really like it when you smell like that."

"Really?"

"But if you want you can wash up right now. Either way is fine with me."

She thinks for a while, then boldly makes up her mind. "If you like smelly girls, I'll stay like this for a little while longer."

"Are you sure?"

"Yes. I can bring air freshener to the animal shelter if I need to."

PPPPPFFFFFFFFT!

You nearly wet yourself with excitement at hearing Fluttershy fart this loud. You never thought you'd hear that.

Fluttershy blushes beet red. "Oh my. Excuse me. Some of the berries in the forest make me really gassy, and while I usually fart silently, I didn't feel a need to hold it in around the animals. I guess I'm not used to holding it in anymore."

"You don't have to hold back in front of me either. Well, you can if you want, whatever you're comfortable with. But I also have a fart fetish."

"You do?"

"So I definitely wouldn't mind seeing you fart. To me it would have the opposite effect of making you seem unattractive. But it's up to you. If you want to hold it in around me, go right ahead. I don't want you to feel uncomfortable."

Fluttershy smiles and lifts her leg.

FFFFFFRRRRRRRRRT!

"I see you made your decision," you say, slapping her butt playfully. She giggles. You both know you're going to have a lot more fun together.

...

As the days go by, you and Fluttershy spend a few days together, and she doesn't wash or change out of her outfit, sleeping in it as well. And she eats lots of stuff that makes her fart, and whenever she eats something that doesn't make her really gassy, or drinks something, she puts fart powder in it. It's pretty clear she finds it fun to fart, more so around you even than on her own, though she still wouldn't fart in front of anyone else other than you and animals.

A week after her return, you go over to Fluttershy's for a kinky night together once you know she's done work at the animal shelter. You knock on her door.

She opens it, and you immediately smell her. She's dirtier and stinkier than a week ago, but she looks cheerful. "Come in," she says.

You enter and she closes the door. "I love how you smell, Fluttershy."

She giggles. "It's fun being a smelly girl. The animals don't seem to mind, and I always spray air freshener whenever I go out so no one can smell me. Except you, of course." She farts loudly.

"Excuse you, Fluttershy," you say, slapping her butt playfully.

She giggles again and lets out a longer, boisterous wet fart.

"Phew, such a farty girl," you say. "You need a spanking."

She can't help but squeal with excitement. You sit down on the couch and she climbs over your lap. You place your hand on her rear end. It looks so cute in those dirty skintight shorts, which feel grimy and a little damp. A visible stench emanates from her and is hitting your nostrils full blast. You love every second of it.

PPPPPRRRRRRT!

As if her explosive fart was a signal, you start slapping her butt repeatedly. She lets out a little squeak with each swat (and a fart with a few of them), and kicks her legs, but it's clear she is enjoying this as much as you are. Although you would slap her butt lightly before you didn't start spanking her like this until after she started to smell bad. Maybe the naughty feeling of being dirty made her want to take the buttplay to kinkier levels.

After 20 swats, you stop.

"Aw, we're done already?" she says.

"I think your butt has had enough," you say.

"Can I please have 20 more swats? Pretty please?" *fffrrrrrt*

"Oh, all right." You spank Fluttershy 20 more times. When you're done, you say "How does your butt feel?"

She gets up and sits on the couch. She winces and stands back up. "Ow... my tushie really hurts."

"I told you."

"Nothing a massage can't fix." She gets on all fours.

Without a moment's hesitation you start rubbing and caressing her rear end. It is as soft as a pillow, like kneading bread dough. You sniff her butt. It smells as foul as you would expect of one who hasn't washed for two weeks. You love having her butt directly in your face in this position, rubbing it with your hands, in skintight, dirty, stinky shorts. And you're sure any second now she's going to-

BBBBBBBBBBRRRRRRRRRRRRRRRT!

She blushes and giggles at this loud, long, deep-pitched, unladylike fart that blasted you in the face.

"Nice one, Fluttershy," you say, patting her butt lightly.

"I had beans for dinner," she says. "And I put fart powder in my water." *ppppprrrrrt*

As you continue to rub her tush, she lets loose with a flurry of wet farts in your face. Words cannot describe the pleasure you get out of this. You never would have expected Fluttershy would want to do something like this, but here she is enjoying this as much as you.

After about five minutes, you stop. "Can you sit down now?"

"Lay down and I'll tell you."

You lay on your back, eagerly anticipating what's to come. Fluttershy sits on your face.

"Yes, the pain's all gone. I could sit like this for another ten minutes if you want me to."

You know she won't be able to hear you clearly under her soft, smelly rear end, so you give her a thumbs up. You love the feeling of her butt in these grimy, smelly shorts against your face every bit as much as your hands.

PPPPFFFFFFT! FLART! BRAP! FFFFRRRT! PPPPBBBBBRRRRRRT!

Fluttershy lets out a series of loud, wet farts ranging in length and pitch. The pleasure you take in this rivals that of the butt massage, and from the way she giggles, you're not the only one who feels this way. She sits on your face and farts on you for seven minutes, and you never want it to stop.

After a particularly long, boisterous, explosive, wet fart, she says "Oh my" and stands up. "That wasn't too much for you, was it?"

"You should know me better than that," you say. "I really enjoyed that. Are you all right? That sounded really wet."

She feels her butt. "Yes, I didn't make a mess." She stretches her arms, and you get a powerful whiff of her stinky armpits. You inhale deeply through your nose. She notices and giggles, letting out a short, wet fart.

"How about we go into your empty closet?"

"Yes, let's do that."

She leads you into an empty closet in her spare room. You walk behind her so the visible stench wafts in your direction, and so you can get a view of her butt. She knows this is why you walk behind her, so she often makes a point of walking in front of you when you go in there.

Once you're inside the closet and she closes the door, it quickly fills with her smell.

"Want to sniff my armpits or my feet first?" she asks.

"I already got a whiff of your armpits earlier, so let's start with that."

Fluttershy raises both her arms, and you put your face up close to her armpit and sniff for as long as you can. The stench of her armpits is so strong that you don't imagine even the animals would want to go near them right now. Unless they had the same fetish you do.

After two minutes of sniffing her armpits, you withdraw your head. Fluttershy sits down, farting loudly as she does so, and removes her socks. New stink waves come off of her feet.

You sniff her feet closely. They smell just as bad as her armpits. She giggles a bit, for you're tickling her a little, and lets out a few wet farts as she sits there with her legs raised. You love that a smell like that could come from a girl as pretty as her, and she's having a lot of fun being dirty and stinky with you.

Once you're done sniffing her feet, you sit beside her in her sauna of stink waves, breathing mostly through your nose, and having a fun conversation with her. She farts several times sitting next to you, which makes you enjoy it even more.

"It is really fun to fart without having to feel ashamed of it," she says. "For someone to not only not be disgusted or make fun of me, but who loves it." BBBBRRRRRRT!

"I'll never get tired of it," you say.

Eventually you decide you've had your fun and step out of the closet. The stench comes rushing out when she opens the door. The two of you sit on the couch watching one of her favorite animal shows. Visible stench is still coming off her and she farts every few minutes. Every moment with her is wonderful.

Soon it's getting dark, so you get ready for bed.

Standing in her bedroom, Fluttershy says "I really liked being a smelly girl, and I love how fun it is for you too. But I might be ready to wash up tomorrow. Is that all right?"

"Of course," you say. "Whatever you want to do. I love it when you smell, but even if you don't, you're still fun to be around. Plus you can fart and have me rub or slap your butt all you want."

She giggles. "Yes, there is that." She stretches her arms, and you get another whiff of her armpits and let out a sigh of pleasure.

Suddenly, there is a bright flash of lightning outside, and only a second later, a loud, booming crash of thunder.

Fluttershy lets out a squeak and wets her shorts, trembling with fright.

"It's all right, Fluttershy," you say. "The storm can't do anything to us in here. I'll be here with you." You get the terrified, trembling, smelly, farty girl into her bed and cuddle with her.

The thunder continues, though quieter than before, and at longer intervals after the lightning. Fluttershy keeps trembling and whimpering for a few minutes, involuntarily letting out a few farts. You cuddle as close to her as possible, patting her on the back and butt. Eventually her trembling slows down and comes to a stop entirely.

"Are you all right?" you ask.

"Much better with you here," she says. A crash of thunder is heard, she flinches slightly but doesn't tremble or whimper anymore. "Having you around makes me less scared."

"That's good to hear. I'll stay right by your side all night."

Fluttershy moves her arms under the covers, and you're sure she's feeling her wet shorts. "I peed myself..."

"I don't mind. Plus you're washing up tomorrow morning, right?"

"Yes." She lets out another wet fart and giggles. You pat her butt lightly. You hear more thunder, but this time she stays relaxed, with a peaceful smile on her face. She is now unafraid of the storm and unashamed of her accident. All she's aware of is cuddling close to you.

The two of you stay close together before she falls asleep. You lay there for several minutes, breathing only through your nose so you keep smelling her. She farts in her sleep several times, but it isn't enough to keep you awake, as soon you fall asleep, cuddled with the smelly girl of your dreams.

...

The following morning you wake up. The storm has blown over and the sun is out.

"Good morning Fluttershy," you say.

"Good morning Anon," she says.

"How did you sleep?"

"That's the first time I slept this well in a thunderstorm." She sits up, stretches her arms, and farts. You get another whiff of her armpits.

"Ready to wash now?"

"I have an idea. I don't know if you want to do it, but..."

"Yes?"

"Would you... um... like to give me a bath?"

"I'd love to."

"But I'd like to keep this outfit on. I'm not ready for you to see me naked yet."

"Sure, you can wear them in the tub. Whatever you want."

"Can you carry me there?"

You know what she's going for with this. "Of course." You get out of bed and put her over your shoulder, taking in her smell one last time, and with your hands on her butt. As you walk to her bathroom, she lets out several wet farts in your face, after which you pat her butt and she giggles.

When you enter the bathroom, she says "Put me on the toilet. I have to pee."

You set her down in sitting position on the toilet and start to fill the tub with warm, soapy water.

"Do you mind tickling my feet?" she asks.

"Don't you want to pee first?"

"No, I'll wait."

You lift both her feet and hold them in place with one hand, and, with your head close enough to them to smell their unholy stench one more time, tickle them with your other hand.

Fluttershy laughs, and in seconds you can hear the sound of her pee splashing into the toilet. Her stinky shorts are still up.

After you're done tickling her, you say "Did you intend for that to happen?"

"Yes." She blushes but giggles. "I thought I'd finish being dirty with something big. And I really liked it."

"I'm glad you had fun." Soon the tub is full and you turn off the water. "Into the tub," you say.

Fluttershy steps into the tub and sits down, still in her dirty and already-wet outfit. You soak her hair with a bucket of warm water and lather it with shampoo. Then you take a bath scrubber with soap and scrub her back, sides, and stinky armpits. You're almost a little disappointed to see the stench of her armpits fade away, but it's fun giving her a bath, and you don't want her dirtiness to go on longer than she wants it to. As you scrub her, bubbles appear around her a few times, which makes her blush and giggle.

Then, you put her in a position with her rear end in the air. You put a large dollop of soap on her butt, causing her to shudder a bit with excitement. You scrub her butt as hard as you can with the bath scrubber for one minute. Then you spend another three minutes scrubbing it with your hands. Her shorts are heavily coated in suds, and you're sure they were clean over two minutes ago. But you really enjoy rubbing her tushie, and you know she likes it too.

Eventually, you scrub her upper legs, then have her sit back down and lift her legs as you scrub them. She farts in the tub again before you start scrubbing her feet. This tickles her to the point she splashes you, soaking you as well, and accidentally farts a few more times. It takes a while due to how bad her feet smell.

When you stop, she says "Sorry, Anon."

"It's all right, I don't mind," you say. You drain the tub, step into it, and turn the shower on, standing under it with her as she rinses the suds and shampoo off. Once the rinse is done you turn the shower head off and step outside, both dripping wet and Fluttershy sparkly clean.

"How was that?" you ask.

"It was really fun," she says. She sniffs her armpits. "And it was fun smelling like that. But at the same time, it's nice to be clean again."

"And I like you either way," you say, slapping her butt lightly. "How about we go for a walk at the park?"

"Good idea," she says. You have breakfast first then step outside, and the sun dries you both in minutes.

Author's Notes:

Yeah, I might've recycled quite a bit from the Rarity chapter. But if you fetishize Fluttershy and not Rarity, or like to see them in the same situation regardless...