Rarity was hanging out with her friends on one hot summer day. They were going for a walk in the park, admiring the scenery and having fun. Rarity was wearing a light blue tank top and short, skintight, purple shorts. Rainbow Dash was wearing her usual outfit, and the other girls wore their Legend of Everfree outfits.

Rainbow Dash lifted her leg and farted loudly. Pinkie Pie giggled and also farted.

"Really, you two are so uncouth," said Rarity.

"Lighten up," said Rainbow Dash, while Sunset and Twilight giggled a bit.

Rarity didn't hold it against them for long, and they kept having fun, until it was time to go home.

As soon as she was home, Rarity locked the door, and walked outside to her backyard which had a section of dirt. Rarity turned on the hose and set it to soak the dirt and turn it into mud, and then returned inside.

Rarity loved to act ladylike when she was around other people, to keep up her feminine image. She always pretended to be disgusted by farts and other such things, and to hate getting dirty.

But, Rarity secretly loved it all.

Rarity started cooking two heaping bowls of baked beans with brown sauce, and two big plates of chili. She also put laxatives in one of them. She of course was disguised when she bought them.

While waiting for them to cook, Rarity drank a can of soda as fast as she could, and then she drank six more sodas.

BUUUUUUUUUUUUUURP!

Rarity giggled at how unladylike that was, and proceeded to drink water until she couldn't drink any more.

When her beans and chili were done, she set them down on the table, and ate them as noisily and messily as she could, getting it all over herself, but making sure to eat most of it.

Once she was done eating, Rarity drank three more glasses of water, and then waited for nature to take its course.

Before long, her stomach started gurgling, and she felt like she was about to explode. Rarity lifted her leg.

PPPPPPFFFFFFFFRRRRRRRT!

Rarity sighed in relief as she let out a loud, wet fart. She'd hate for any of her friends to find out how much she absolutely loved to fart! She wished she could laugh at Rainbow Dash and Pinkie Pie farting, but she had to keep up her ladylike image.

Even if Twilight and Sunset thought it was funny.

BBBBBRRRRRRRTTT!

This fart wasn't as long, but was louder, and deeper-pitched. Rarity loved it, and slapped her butt. She couldn't help it, it was so arousing to fart this loud.

PPPPFFFFFT! BRRRAAAAP! FFFFRRRRRT!

Rarity giggled with each fart. As time went by, her farts became wetter and smellier, and her underwear started to get dirty - but she didn't mind. She liked it when her farts made her underwear dirty!

After about a half hour of farting, Rarity felt the urge to pee. She stepped outside into her backyard so as to not make a mess on the floor, and took off her socks and shoes so she was barefoot.

She held it for as long as she could, accidentally farting a few times. She wanted to enjoy this to its fullest extent, and she loved being desperate. She had secretly enjoyed that time she had been desperate around her friends, even though at the time she was afraid of wetting herself in front of them. Fortunately she had made it then, although she had leaked in her underwear before finding a bathroom.

Once Rarity reached the level of desperation she was hoping for, she spread her legs apart, causing her to leak a little into her shorts. At that leak, Rarity voluntarily let go and began to pee like a race horse. She positioned her legs so that the pee ran down them as it soaked her shorts and panties. The grass around her feet began to get wet, soaking her feet as well. Rarity loved it all - the warmth, the wetness, the relief, and the feeling of doing something dirty and naughty that she wouldn't dare do in front of anyone else.

She sat down on the grass, still peeing, so that the wetness started to soak her butt. She sighed in immense satisfaction as she continued to wet herself.

After about a minute and forty seconds, Rarity finished peeing, and sat there in her wet shorts. She stood up, examined her wet shorts in the reflection of the screen door, and slapped her soaking wet tush. As if this had been a signal, a boisterous wet fart erupted out of her rear for exactly ten seconds. She sighed of relief then giggled a bit to herself, patting her butt lightly, and farting again for about one second.

That fart must have been longer because of how much she had held back when holding in her pee, and she liked farting louder and longer. Of course, she was still professional at farting silently when she was in public or with her friends, and only if they could never smell it.

She continued to fart for another ten minutes before the laxatives began to take effect. As Rarity let out another wet fart, she could feel her panties become a lot dirtier, and knew she was close to soiling herself.

Before long, she could feel the pressure in her bowels. Beans and chili could get quite messy - but the messier, the better!

Rarity farted a few more times, but after the last fart she could feel that the next time, it would be more than just a fart.

The time was now. Rarity closed her eyes tight and pushed as hard as she could.

PPPPPPPPBBBBBBBBBBBLLLLLLLLLLLLRRRRRRRRRT!

With a very loud and very sloppy fart, Rarity released a wet brown mess into her shorts. She sighed of relief and satisfaction. She loved the feeling of messing herself. It was one of the dirtiest things she could do. The smell quickly entered her nostrils, and she inhaled deeply.

Rarity paced around a bit in her messy, smelly shorts, before she could feel the second wave coming. Rarity let it all out again, quieter this time and it was thicker than before, causing the brown bulge in her shorts to get bigger.

She sat down, enjoying the sensation of her warm mess squishing beneath her rear. She squirmed a bit where she sat to experience the squishy sensation as much as she could. By now, the next wave of pee had entered her bladder, so she just peed herself again.

Rarity smelled really bad now, but she wasn't done yet. She turned the hose off and walked into the mud puddle, which went up to her ankles. She could feel the mud squish between her toes. Rarity sat down, and began playing around in the mud. Within five minutes she was completely covered in mud, so that she'd be hard to recognize if someone saw her. Oh how she loved getting dirty, and the mess in her shorts was surely mixing with the mud as well.

She eventually sat still for about a minute. She let out a loud fart, and was sure she had further soiled her shorts, but it was hard to tell at this point.

Then she lay facedown in the mud, with her feet in the air. She peed again in this position, followed by another wet fart. She slapped her very dirty butt at this, giggling to herself.

Eventually, Rarity was done having fun, so she hosed herself down so she was at least relatively clean and wouldn't track mud around the house, and then took a bubblebath. She farted in the tub more than once, much to her amusement and arousal. After peeing in the water with a sigh of relief, Rarity drained the bathtub and took a shower, stripping off her tank top, shorts, bra, and panties halfway through to get completely clean.

Once Rarity was sparkly clean, she changed into a new pair of shorts - the same she had worn in Legend of Everfree - and an identical tank top, and put her wet, still slightly smelly outfit in the laundry, which was close to full, making today the perfect day to do this. Rarity put all her laundry in the washing machine with her strongest detergent and turned it on.

She wasn't worried that her shorts were stained - this detergent always got the stains out every time! Her friends had no idea how many times she had soiled these shorts, even with Applejack staring at her butt, which Rarity liked but she pretended not to notice.