You've been going out with Twilight Sparkle for a while, though you haven't told her your kinks yet. But one day, when you're hanging out with her at the park, you notice she smells a little.

Twilight notices you sniff, and giggles nervously. "I'm using the bathtub for an experiment, so I haven't showered in two days. In about three days it'll be done. I hope you can put up with my smell until then."

"It's all right, I think I'll be able to." You slap Twilight's butt lightly, which looks really cute in her short, tight purple shorts she's wearing with a light blue T-shirt (Legend of Everfree outfit).

Twilight giggles. You're already at the point where she likes it when you do things like that. "Should I change into a cleaner outfit until my experiment's done?"

"I like you the way you are." You love this outfit on her the most, and though you haven't told her this yet, you love smelly girls.

"As long as you don't mind it smelling a little."

"Trust me, it won't make me find you any less attractive."

She smiles and you continue your day at the park.

You stay over at her house tonight, and she gives you a view of the experiment she's conducting in her bathtub.

"Don't you have any tanks in your lab you can use?" you ask.

"They're all full at the moment."

When it's nighttime...

"If you think you can handle the smell, do you want to sleep over tonight?" Twilight asks.

"I'd love to," you say. "And... can I make a request?"

"Yes?"

"Would you mind sleeping in that outfit instead of your pajamas?"

"You really like this outfit, don't you? In that case, I will, but it'll probably smell more tomorrow morning."

That night, you enjoy laying next to a slightly smelly Twilight in those shorts. More so when she farts in her sleep.

...

Three days later, Twilight says "My experiment is done! I can wash now. I'm sorry you had to put up with my smell for this long."

"It's all right," you say. "I really don't mind." You take a deep sniff of her.

"Is everything all right?" she asks.

"Well..." Your heart starts beating fast. "Promise you won't get weirded out?"

"I promise."

"I... really like it when you smell." You blush.

"You do?"

"That's one of my fetishes."

"In that case, I won't wash or change clothes for a while."

"You don't have to do that. You wash when you feel like it."

"But I know you like it, and I don't mind." She sniffs her armpit and recoils slightly, but giggles.

"Well, if you're all right with it, then that'll be awesome." You slap her butt again.

That evening you stay over at her house again. She cooks some of your favorite food, and some beans for her.

A half hour later, you're standing in the kitchen discussing what to do tomorrow, when she farts loudly.

FFFFFFFFFFFRRRRRRRRRT!

She blushes and giggles nervously. "Excuse me. That was so unladylike, but beans make me really gassy." A short, slightly quieter but wet fart makes its way out of her.

"It's all right," you say. You feel confident in saying your next words after the smelly girl thing. "I really like it when you fart."

"You... don't find it disgusting?"

"I love smelly girls. Of course I don't." You playfully slap her butt again, which makes her fart again.

She giggles. "It's fun being able to fart without shame. And it's also kind of fun smelling like this."

"We're gonna have a lot of fun together."

...

You go over to Twilight's house two weeks after she stopped washing. As soon as she answers the door and you enter, you pick up a foul smell. A visible stench is coming off her, and her shirt, arms, legs, and shorts look pretty dirty.

"Good morning Twilight," you say.

"Good morning Anon," she says. "How do I smell?"

"Really bad." You slap her butt playfully and she farts.

"What do you want to do first?" she asks.

"Our usual sniffing session," you say.

She stretches her arms, and the stench of her armpits hits you immediately. You get as close to her armpits as you can and sniff. They smell absolutely foul, but you love it.

Then she lets out a boisterous wet fart. PPPPPRRRRRRRT! She giggles.

"You need a spanking for that," you say. You sit down on the couch and Twilight immediately goes over your lap. You love having the smelly girl laying in this position, and the sight of her rear end in those stinky shorts. You raise your hand and slap her butt. She kicks her legs as you swat her, but she's enjoying the spanking as much as you.

After about 25 swats, you stop. "That went on a little too long. You need a butt massage."

Twilight gets on all fours. She knows from experience she usually needs one after a spanking, plus she really loves them even if her butt isn't sore.

You start caressing her tush and sniffing it. Her shorts smell foul, though slightly less so than her armpits. They feel dirty and grimy and slightly damp.

BBBBBBBBBRRRRRRRRRRRRRRRT!

She sighs in relief after this long, deep-pitched fart, while also taking pleasure in the butt massage.

"Nice one, Twi," you say, and you keep rubbing her butt, while she keeps farting in your face.

"What did you eat?" you ask her.

"Some of the fart powder I made," she says. *ffffrrrrt*

After about five minutes, she asks "Here's an idea. I have a small decontamination room in my lab. It's just big enough for a few people. Want to go in and continue to smell me there?"

"Ooh, I'd love that!" you say.

Twilight leads you into her glass decontamination room. None of its mechanisms are on, so you and her stand in the empty room, and as soon as she closes the door, it is full of her smell. This is like a sauna to you.

"Want to smell my feet?" she asks.

"Would I!" you say.

Twilight sits down, farting as she does so, and removes her socks and shoes. You take her feet and sniff them. They smell just as bad as her armpits. You sniff them as deeply as you can, sighing in immense pleasure when you're done.

She giggles. "You never get tired of that, do you?"

"Nope," you say.

You sniff her feet for a minute or two, before she says "I'm feeling really gassy right now. Lay down."

You lay on your back, and Twilight sits on your head. Your face is pressed against her smelly, grimy shorts. You inhale deeply through your nose again, taking immense pleasure in the smell and the feeling of her butt on top of your face.

PPPPPFFFFFFT! BBRRRAAAAP! FLART! FRRRRT! PPPPBBBBRRRRRRT!

She giggles as she unleashes a flurry of explosive wet farts on your face, enjoying this as much as you are. You couldn't have asked for a more fun time with a smelly girl farting while sitting on your face.

Eventually, she gets off you, and you sit inside this room for several more minutes, enjoying the smell filling the entire room, before you step out of it.

"Want some lunch?" she asks.

"Sure," you say.

You walk to the kitchen, and she says "I'll probably stay like this for another two weeks, then I'll wash. Does that sound good?"

"If you don't mind."

"I hope you're not too disappointed when I stop smelling like this."

"You were always fun to be with even before that. Plus if you want to have a kinky time there's still farts and buttplay."

She giggles. "Those are pretty fun." She stretches her arms, and more visible stench from her armpits rushes in your direction as you get a whiff of them.

You can't resist going over to her smelly armpits and tickling them. She starts to laugh, and you tickle her harder. Until she laughs too hard and wets her stinky shorts.

You stop tickling her. "I'm so sorry Twilight."

She blushes, but giggles. "I'm already dirty, so what's a little pee?" A loud, high-pitched, wet fart makes its way out of her. "Here's an idea. In two weeks when it's time for me to clean up, how about you give me a bath in my stinky outfit?"

"That sounds like it'll be fun."

"Make sure you scrub my rear end a lot. It really needs it." She winks.

"As long as you fart in the tub."

"Deal. Now what would you like for lunch?"