> Twilight's Experiment
>  by Epimancer
> --------------------------------------------------------------------------

> Spike's Fetish
> --------------------------------------------------------------------------


Chapter 1 - Spike’s Fetish


By: Epimancer

        “Spike, what is your fetish?”
        When Spike heard this, he had to do a double take, staring at Twilight with a look of confusion and disgust. She only looked at him quizzically.
        “Di-did I hear you correctly?” Spike asked. Twilight was like a sister to him, and this was completely out of the blue.
        “A fetish.” Twilight replied, “you know, a kink, desire, stimulant-”
        Spike cut her off by covering his ears. “Please, Twilight, I really don’t want to hear this anymore.”
        “I’m sorry Spike, but I really need to know.” Twilight said. For years, she had an expert knowledge in all sorts of things, with the exception of one major one: sexuality. It was a very touchy subject that was awkward for her and was one of the few things hard to view scientifically. So, she thought the best way to do that was to learn from her closest friends (Because asking strangers would be super awkward, right?).
        “Ugh, fine” Spike groaned. He couldn’t believe what he was about to say next. “Well, I guess I would say I like… watching mares clop…” He said, his usually purple scales were now red on his cheeks as he said it out loud, his voice barely above a whisper.
        “Perfect! Now come with me, Spike!” Twilight said, grabbing him by the arm and dragging him down to the basement. There, she hooked him up to a machine consisting of wires, a monitor, and lots of beeping.
        “Uhm, Twi? What is this?” Spike asked as he was hooked up to it. Twilight ignored his question, and hooked a small electronic device that covered his heart.
        Finally, Twilight looked up at him. “This is a heart rate monitor. I need to see how you body changes when your pleasure is right in front of you.”
        Spike tilted ahead, unsure of what he meant. At least, he was unsure until he saw Twilight turn around and lift up her tail, revealing the small pink line that few ponies have ever seen. Spike’s jaw dropped, and his tongue was now lollygagging, while he stared at Twi’s special place. Again, she was like a sister to him, so he had seen it before. Except, he had never seen it in this...position.
        A small beep came from the machine. Spike’s heart rate was rising. “Ah, perfect!” Twilight said, turning back around to face a blushing dragon face to face. “It works. Now then, let’s really get started,” she said.
        “That wasn’t it?” Spike said. All he wanted to do right now was crawl into a hole and die. This was extremely embarrassing for him, but he had to admit; it was very erotic.
        “Nope. That wasn’t even what was considered your ‘fetish’.” She replied. “We need to do exactly what gets you off.” Twilight was giggling. Science was so much fun, and it was about to get better.
        Behind her was a red, velvet couch, just across from the wooden chair Spike was sitting on. Twilight crawled onto it, and lying on her back, she spread her haunches and gave full view of her pussy facing towards Spike.
        “Is this what you like looking at?” She said, circling her marehood with her hoof, a sultry smile on Twilight’s face.
        “Oh, sweet Celestia.” Spike said. Twilight looked at the machine and notice his heart rate was slowly going up. It’s working. She thought. Then, she looked down at Spike’s pelvic region, and her smile grew larger.
        “I am glad you are getting as… excited as I am.” She said, nodding at his crotch. Spike looked down, and came into full view of his unsheathed cock, standing at attention. If it was possible for him to blush anymore, he would.
        “You know, I think if I am pleasuring myself, it should be fair that you should do the same.” She pressed against her special mare place, moaning loudly. Her pussy was dripping wet. That was all it took for Spike to lose any discretion.
        He began stroking his dick right in front of the alicorn, and she was doing the same to herself. Twilight’s hoof was covered in her own juices, and she continued to rub her pussy.
        Twi’s moans and Spike’s grunts filled the bottom part of the library. He was stroking his dick, bringing his hand up and down, precum already covering part of his hand. He was in heaven. Outside of Playcolt, he had never actually seen a mare in an erotic position. However, staring at a beautiful flank getting off right in front of him, he could certainly tell there was a difference.
        After continue to rub her vagina raw, Twilight’s breathing became more rushed and she could tell she was close. Her hoof was now rubbing on her swollen clit as fast as she could, and she felt like she was on cloud nine.
        “I-I’m close…” She was barely able to say. Once again, she noted the monitor, and made a quick mental note. His heart rate had almost doubled since the start, the exact result she wanted.
        “Me...too.” Spike grunted. A few seconds later, he couldn’t hold it back. White spurts of jizz shot out of him as his orgasm rocked his body. Almost all of his hot cum landed on Twilight, who also orgasmed, and her hoof was now soaked in love juices. For a while, all they could do was pant and stare at each other, lust in their eyes.
        “Well…” Twilight said. “Thank you for the help.” And with that, she got off the couch, and picked up a towel under it to clean herself with. She had a busy day ahead, and while a sticky backside seemed appealing, she couldn’t go the rest of the day with it.
        “You’re...welcome.” Spike said. Twilight unhooked him off the machine, and packed it into a nearby saddlebag that had a picture of her cutie mark on it.
        “Well, I am off!” She said, her naughty smile gone.
        “Where are you going?” Spike asked.
        “I have some chores to do. Did you think you were the only one I was testing?” Twilight said, staring at him.
        “So… you are doing others?” Spike was disappointed. He liked to think that he was the only one that would have an intimate moment like that.
        “Awww, you’re jealous!” Twilight exclaimed. “That is very cute. Don’t worry though, I am only doing special friends, which are all mares.” She walked over to him, her lips right in front of his.
        “And you are my only special male friend.” She said, before planting a deep kiss on him, prodding Spike’s mouth with her tongue. He was shocked, but after a few moments, closed his eyes and let himself enjoy the moment.
        Finally, Twilight ended the kiss. “Alright, I have to go. I will be back later. Make sure to clean up everything.” She said, implying both the brand new sticky love nest and the library.
        “Will do!” He said, realizing that he never feel so excited as now to do chores until right now.
        Twilight climbed back up the stairs, carrying the monitor and a small scroll with a list of names.
        “One down, five to go!” She exclaimed. And with that, she trotted out the door, ready to begin her day full of tests and experiments.


> Pinkie Pie's Fetish
> --------------------------------------------------------------------------


Chapter 2 - Pinkie Pie’s Fetish


By: Epimancer

        Twilight was now staring at the most famous bakery in Ponyville: The Sugarcube Corner. She opened to the door, and was greeted with sweet smelling bread and pastry colors lining the wall. It always put her in a good mood, being here. The atmosphere was wonderful, and of course, it was one of her best friend’s home.
        She trotted up to the counter. A pink pony was behind it, furiously working on creating an appetizing looking cupcake. Twilight Sparkle couldn’t help but notice the mare’s equally appetizing looking plot. She had a rather large posterior, and it was making her mouth water more than the pastries.
        “Just a moment!” Pinkie Pie said in a sing-songy voice. “I just have to finish this...one little… thing.” And with that, she turned around, cupcake in her hoof. “Oh, hi Twilight!” Pinkie said, before shoving the cupcake in her mouth and eating it with one bite. She licked her lips right after. “What can I do for you?” She asked, her usual smile shining brightly.
        “Well, I have a question to ask.” Twilight said, “Can we talk somewhere more private?”
        “Yep!” Pinkie replied, before grabbing Twilight and dragging her into the kitchen so fast Twilight would swear she used magic if she didn’t know better.
        “What’s up?” Pinkie Pie asked.
        “I just have a quick question… what is your fetish?” Twilight asked, only revealing a small red blush on her face.
        “Food!” Pinkie Pie replied.
        “Food?” Twilight asked, confused. “What do you mean?”
        “Well, everytime I think about one REALLY good cupcake or whipped cream covering my filly parts, I get wet every time!” Pinkie said. “See, I am already wet!” And with that, she turned around so her flank was right in front of Twilight. And she wasn’t lying; she could see her vagina was covered in wetness, with a little bit on her tail.
        “Tha-thats nice Pinkie.” Twilight said, eyes transfixed on her friend’s plot. “If I may, can you do me a favor?”
        “Of course! Anything for one of my bestest friends in the world!” Pinkie said.
        “I was hoping I could run a test on you, just for a couple of minutes.” Twilight asked. Pinkie turned back around, much to the disappointment of Twilight.
        “Of course! Mr. and Mrs. Cake!” Pinkie called out. “I am going on a break!”
        And with that, Twilight was whipped away from the kitchen as they headed for Pinkie’s bedroom.
____________________________________________________________________

        
Once they got there, Twilight explained her experiment and Pinkie was happy to help. Twilight strapped her onto the machine, and used magic to protect it and make sure nothing got on the wires.
        Next to the bed Pinkie Pie was on, she had a silver platter that was decorated with chocolate strawberries, whip cream, and Twilight’s personal favorite, lemon bars.
        “Alright Pinkie, what should I do now?” Twilight asked, putting on the sultry smile she gave Spike.
        “I just want you to like back and let me... decorate you.” Pinkie had the same look on her face as Twi.
        “Alright.” Twilight said, as she climbed onto the bed and lied on her back, spreading her legs out. Pinkie Pie reached her hoof down, giving Twilight a slight tease, causing her to moan.
        “Alright, lets get started!” She said, and she grabbed two of the strawberries. She came level with Twilight’s crotch, perfectly shaven. Pinkie then rubbed her hoof along Twilight’s breast, searching for her tits. When she did, Pinkie Pie put the strawberries on them, balancing the fruits perfectly.
        “Oh, Pinkie… they’re cold.” Twilight said, closing her eyes and relishing in the pleasure.
        “Okay! Let’s go to the next thing!” Pinkie grabbed a can of whip cream and shook it, then covered Twilight’s marehood with the cream.
        Twilight shivered with pleasure. She took a quick peek at the heart rate monitor, and saw that it barely moved. She frowned.
        “Are you feeling anything?” Twilight asked. She wanted to make sure nothing was going wrong with her experiment.
        “Let me finish up one more thing.” She replied. Pinkie picked up a lemon bar and put part of it in her mouth. Slowly, she crawled over Twilight, careful of the delicious desserts she would soon take pleasure in.
        Pinkie Pie kissed Twilight, forcing the lemony pastry into her mouth. It was sweet and salty, and Twilight thought it was delicious.
        After the tasty treat, Pinkie Pie moved lower, planting kisses over her stomach and chest before arriving to Twilight’s teats. She picked up the chocolatey treat with her mouth, eating in with a large smile on her face. The heart rate monitor beeped.
        “For some reason food tastes so good mixed with a mare’s estrus!” Pinkie said, her grin was ear to ear.
        She moved on to the second one, doing the same thing. Twilight was moaning loudly as she felt Pinkie’s tongue rubbing over her breasts.
        “Sweet Celestia, Pinkie!” She said.
        “Oh, just wait.” Pinkie replied, before moving down to Twilight’s marehood.
        The whipped cream was already melting down her thighs, and Pinkie licked her lips.
        “This looks super duper good!” Pinkie said, before diving in,  getting all of the curves. She probed around, lapping up the whip cream that was soaked with Twilight’s marecum. She pushed her tongue inside, rubbing around inner walls while she moved her hooves up and down Twilight’s thighs. Twilight grabbed a nearby pillow to suppress the noises she made. If the Cake’s children heard her, she would never be able to get a good pastry again. The monitor was beeping louder and louder.
        “Looks like some of it melted down into your plot! I can fix that!” She said.
        She moved down, and stuck her tongue into Twilight’s asshole. This was a new feeling for Twilight Sparkle, but she didn’t mind it at. At all. Pinkie Pie dug deep, her face buried into Twi’s asshole, while using one hoof to continue pleasuring Twilight’s marehood.
        Pinkie Pie worked her way up, and began sucking on Twilight’s clitoris, biting lightly. This was a tipping point, and the orgasm began to rise.
“Oh horse manure, I’m cumming!” Twilight shouted, and her back spasmed, lifting off the bed and he squirted all over Pinkie Pie’s face, covering it in juices. Twilight’s eyes rolled back into her head, and for about eight seconds, she couldn’t free. Finally, her intense orgasm cleared.
“That is insane! Pinkie, how did you do that!?” Twilight asked, after she got a hold of herself.
“Yeeeeears of practice!” She replied, before rolling off the bed.
“So, do you want me to return the favor?” Twilight asked shyly.
“Nope!” Pinkie Pie replied. She raised up a hoof, glistening in the sun. “I already got myself off twice during that. I prefer cumming on my own hoof!” Pinkie said, giggling and licking her hoof. She began to walk out the door.
“Pinkie, wait!” Twilight called out. Pinkie Pie turned around.
“Can I use your shower?”