Chapter 21

Later on, half of the group had become hungry while the other half wanted to play another butt-related game, thus Pinkie came up with a good way to do both. After heading back to her home, she came back carrying a large amount of whip cream cans, which only took a few seconds strangely enough.

She proposed that the ones who wanted to play a game; like Sunset, Applejack and Rarity, laid down on their backs while the ones who wanted to eat; like Twilight, Rainbow and herself, made whip cream swirls on the butt cheeks of each of their lying friends. Fluttershy would act as the judge due to being too shy to do either.

The game was like a standard state fair pie eating contest; no hands allowed and the first one to clean the whip cream swirls off of both butts cheeks wins.

After putting a whip cream swirl on each of Sunset's, Applejack's and Rarity's butt cheeks, Twilight kneeled behind Sunset, Rainbow kneeled behind Applejack and Pinkie kneeled behind Rarity. All three eaters quickly put their hands behind their backs.

"R-Ready?" Fluttershy asked. All six of them nodded in confirmation. "Ok then… 1… 2… 3… go!"

Twilight, Rainbow and Pinkie lowered their heads and quickly started to eat the whip cream off their friend's tushies. As their friends licked the whip cream off their rumps the three lying girls all giggled and shook with pleasure, especially when their friend's tongues started to make contact with their flesh.

The pink haired girl raised her head from Rarity's rump, face covered in cream. "Wowie who knew licking whip cream off butts would be so fun? Oh yeah, I did!" Pinkie giggled before licking the cream off her face.

"Uh, hey what time is it?" Applejack inquired before feeling Rainbow's tongue run up her glutes. "Whoa Nellie…!"

"Uh… 4:10?" Sunset answered before squealing as Twilight stuck her face between her cheeks and continued licking.

"Dang flabbit, guess it's time for me to mozzie on back home." Applejack said.

"Oh yeah me too I gotta get home too." Rainbow realized.

"Oh my, I have to get- Eep!" Rarity said as she felt Pinkie putting her face between her butt cheeks and blowing a raspberry into them.

"I've always wanted to do that!" Pinkie grinned before moving her big tongue right across Rarity's twin orbs, making them move to the side then jiggling when the tongue left them. Now there was no cream remaining on her, at least none that they could see. "I win!"

The other participants sighed in defeat.

"Well, it was fun while it lasted." Twilight remarked.

"Yeah… still I hate losing." Rainbow grumbled while she and Twilight finished off the rest of the whip cream still remaining on their friend's rears, making them shiver with pleasure once more until they reached their climax.

Fluttershy leaned over them. "Are… you all ok?" she asked, concerned.

"Fine, darling…" Rarity panted. "I trust you… can find your clothes where you left them…"

Everyone nods in confirmation as they start to stand up, besides Rarity.

"Good, I shall see you all tomorrow then." Rarity said. Everyone clamoured in agreement and said their goodbyes as they started to head off, though before Twilight could get very far, Rarity grabbed her hand and stopped her. "Twilight, now… if you don't mind… I have a request."

Later after the others left for home, Rarity called Sweetie Belle and said she's having a sleepover at Twilight's so she knew where she was.

Meanwhile Twilight and Rarity put on some button down shirts but didn't put on any pants or undies since they decided to go bottomless. As the two hung around in Twilight's room eating, gossiping and giggling about everything that happened, the two started to become bored and began to think of what to do next.

"So Twilight, what do you think we should do with our derriere's?" Rarity asked while rubbing her white bottom .

Twilight began thinking of some ideas while rubbing her own butt on her bed. "Hmm… I'm not sure… I wish we could have measured the glutes of the others before they left. We already know Rainbow Dash is thirty-three inches, Applejack's thirty and you're thirty-five, the largest of us all."

"And beginning to become proud of it, thank you." Rarity stated with a smile and a hair flip. "Actually, come to think of it, we have not measured your booty yet darling!"

"Oh yeah… to be honest, I was kinda hoping you forgot…" Sci-Twi admitted.

"Alright then, hands on the bed then darling and stick your bottom out." Rarity instructed as Sci-Twi sighed and after getting off the bed, went over to the front of it and her hands onto it. She stuck out her booty in front of Rarity next as she got the measuring tape from her desk.

"Ooh, I can't wait to find out how big your rear is!" Rarity practically squealed. "Maybe it'll be even bigger than mine."

"We'll see…" Twilight muttered, still a little uncomfortable with the whole thing.

Rarity slowly wrapped the measuring tape around Twilight's ass, which sunk into the flesh of her glutes just as much as it did her own, making her very hopeful. She was a little disappointed however when she saw the result.

"Aha," she said.

"What? What is it?" Twilight inquired, quickly.

"Thirty-three inches, the same as Rainbow Dash." Rarity replied.

"What?! But that's impossible! I've been on the diet average for a person my age!" Sci-Twi remarked in shock.

"Well did you binge on any sweets lately?" Rarity inquired, eying her butt.

"Uh… well… I sometimes eat a few snacks that are high on sugar when I'm studying… but that's brain food!" Twilight reasoned. "I also believed that you don't gain weight if you burn calories using your brain!"

"Well, they were wrong then, weren't they?" The fashionista comments.

"Fair enough." The techie girl shrugged.

"So let's see, so far we pressed our butts onto glass, mooned a crowd, did… the nasty in Principal Celestia's office, had a twerk off, and ate whip cream off each other's booties.: Rarity listed. "Is there anything else we can do with heinie's?"

"We never tried oiling them." Twilight admitted.

"Ah! True!" Rarity admitted. "Then that is our next activity!"

"Yes, a great way to learn about and experience new realms of pleasure!" The bespectacled girl agreed as she adjusted said spectacles.

"Question is which oil do we use, cooking oil, baby oil…" The fashionista listed. "Hm how about baby oil"

"Oh! I know where we can find some baby oil!" Twilight revealed before leaving the room. Rarity waited for a couple seconds while pressing butt on the glass door before Twilight came back with a bottle in hand.

"Found the baby oil" The science girl announced

Rarity's rump seemed to jiggle with excitement. "Excellent Twilight, now how shall we rub the oil all over our rears. Let them shine like diamonds and be as smooth as silk!" she proclaimed dramatically.

"Yeah, they'll be totally shiny and slippery!" Sci-Twi agreed with excitement as she opened up the oil, taking in the smell of it.

"So without further adieu let's oil our rumps!" Rarity declared.

After Twilight got out a mat and laid it out on her bedroom floor, to avoid getting any stains because of the oil, Rarity laid herself down on her belly, proudly bearing her rump. Sci Twi then poured some oil onto Rarity's waiting tush, making her shiver.

"Oooh... such a cold sensation…" she cooed. "Make sure you get it everywhere, ok darling?"

"Sure will." Twilight nodded before putting her hands onto Rarity's bottom. Her fingers sunk into the flesh a little, making Rarity moan while the sciency girl's hands became soaked with oil. Slowly but firmly, she began to move her hands all over Rarity's glutes, from her sitting spots to the far ends of her cheeks.

She even got some into her crack and made Rarity squeak louder and louder as she went up it.

"Mmm that's it darling... make my arse shine like a diamond!" Rarity cried, full of arousement.

As Twilight continued to rub the oil all over, Rarity's skin began to absorb and soak it all in, making the flesh of her butt cheeks not only become smooth but also very shiny, glowing even. Her folds were even becoming wet, though it was hard to tell which was the dripping oil and which was Rarity's fluids as Sci-Twi continued to soak the rest of it in.

"Wow Rarity, your rear has become so smooth and shiny it's reflecting light!" The science girl remarked in awe as looking at Rarity's now smooth and shiny tushie.

"Mmm, thanks to the oil, my bum is now a spotlight!" Rarity said, proudly making Sci-Twi giggled

"Yeah it is, oh how about we rub our butts together like back in my lab?" Twilight offered.

"Of course, but first! Rarity began before standing up and facing Twilight. "We need to oil yours."

"Right!" Sci-Twi agreed as she got on the mat next, laid down and raised her purple butt to moon Rarity. "Oil a way Rarity."

"Oh I certainly will." The purple haired fashionista declared as she started to oil up her own hands. Sci-Twi felt Rarity's oiled hands on her tushy as she was enjoying it

"Mmm, Rarity it's so cold yet so good…" the science girl moaned while feeling her friend's oiled hands on her butt. As much as Rarity enjoyed rubbing her friend's arse she soon got a better idea as she stopped, turned around and pressed her oily butt on Sci-Twi's making both shiver in pleasure. "Whoa! Rarity, what are you…?"

"Sssh, just go with it, darling." Rarity told her gently as she slowly started to move her derriere up and down Twilight's. Both their cheeks remained flattened but kneaded as they rubbed against each other. As they felt the smooth flesh of their tushies move up and down, both girls let out moans and squeaky noises, similar to the ones their butts made.

"Oh Rarity, this is amazing…" Sci-Twi remarked while shaking.

"I know, darling. Tell me, does this remind you of anything?" Rarity asked.

"Oh yeah, back in my lab we rubbed our butts together. It felt cold at first but really good after words…" Twilight recollected. "Ooh!"

Twilight let out a long moan as Rarity sat on her tukus even harder, the weight of her friend on top of her was almost overwhelming and felt like she was crushing her, but the pleasure she got from it was much greater. Rarity felt the same way as her head and eyes moved up and her knees quivered, which she gripped tightly in her hands.

"Mmm darling your rear makes an excellent chair." Rarity remarked.

"You're welcome…" Twilight sighed. "Ooh… I feel like you're making my glutes as flat as pancakes."

"Oh, trust me darling. No matter how large my derriere is, it will never flatten your behind, any more than you could flatten mine."

"Yeah… that is a high improbability…"

"Exactly."

"Hey, try moving it around in circles. I wanna hear what other kind of sounds they can make, for… research purposes."

"Oh, of course 'research purposes'." Rarity said with a suggestive wink before she began moving and grinding her bottom against Twilight's around in circles, making various squeaking noises and kneading their tush's even more.

"Mmmm, oh yeah, that's the stuff…" The bespectacled girl cooed.

"Oh yes darling, that's more like it" The fashionista cooed as well.

"Hm, you know… Ooh, I was thinking, since we all like… Mmm, our butts so much, Ahhh, how about we start a club… ooh, about mooning." The bespectacled girl cooed

"Ooh that sounds like a splendid idea!" Rarity commented

"But the question is what should we call it?" Sci Twi wondered.

"Hmm I'm not fairly certain what should our butt club be called, but we should ask the others for their opinions too." Rarity pondered

"Well as much as I like this 'research' to go longer it's getting late, and we have to be ready for school." Sci Twi responded

"Oh goodness you're right we'll have to pick this up tomorrow after school." Rarity replied as she stood up and saw the time was 9:45.

"Of course…" Twilight began as she stood up, sporting a super smooth and shiny butt of her own. "There is still time for one more fun thing we can do. Just to burn off all the energy we still have."

"I'm listening." Rarity smiled, intrigued.

Moments later, both Rarity and Twilight were standing back-to-back and had purposely pressed their rear ends together. Both were flattened against each other and squeaked whenever one of them rubbed against the other, making the two girls giggle.

Up and down and side to side, they moved their glutes all around each other, moaning and cooing with pleasure. Soon they stopped grinded booties and bent over before moving back a little at the same time and giving each other little butt bumps.

They moaned and giggled as they continued to bump butts, the speed of which slowly increased until the flesh on each of their derriere's rippled and quivered. The sound of their glutes continuously hitting each other seemed to increase along with the speed, soon it sounded like hands clapping rapidly.

"Ooh… it feels so good… doesn't it feel good, Twilight?" Rarity asked while moaning.

"Ye-Y-Y-Yes…" Twilight replied, her eyes going up while sporting a large smile on her face.

As their bottoms slammed and rubbed against each other more, their vagina's continuously touched each other also, increasing the amount of pleasure they were feeling. Both sensed that they were getting closer to reaching their limit and at that point, both were too into what they were doing to care much about anything.

It was only when they started to bump each other's butts at an even more rapid pace then flattening them against each other to make their pussies kiss that they finally hit their climaxes. They both let out long screams before their legs turned to jelly and caused them to collapse on the floor, which is where they slept for the remainder of the night.