Credit to Anon for the random twilight clop in the flutterrape thread.
>>32066907

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"Munghhhhh..." You groggily awaken, pinching your nose between your thumb and pointer finger digging the sand out from your eyes. "Time to-"
>Knock-knock-knocking on the front door.
"Tell Fluttershy to fuck off."
>You frown and throw the sheets off your bed, burying your rage in that ever filling bottle of pent-up aggression down in your lower intestine. 
>Wearing nothing but boxers and bringing a distinct lack of fucks to bear, you approach the front door.
"Who is it?" You ask, knowing the answer already.
>"Uhm, its me. Fluttershy."
"What do you want?"
>"I'm here to gue-"
"No."
>"But I haven't even guessed yet!" She says, sounding depressed.
"I already know how the next forty-five seconds are gonna play out; you ask me my fetish, I say no, you guess again, I tell you to fuck off, followed by me slamming the door in your stupid face."
>"Oh... Is planning out the next forty-"
"Fuck off! I'd slam the door but its already closed!"
>"Oh, alright then!" She replies jovially, ever so numb to your insults. "I'll see you tomorrow!"
>You press your ear to the door, listening for the sound of hooves trotting away.
>A moment passes and you're sure shes gone.
"Fuck this place." You mutter and shake your head. "Okay, /now/ time to-"
>More knocking.
"No one would know..." You think to yourself, "I could just snatch her up and just strangle the shit out of her. Hell, people go missing all the time."
>Despite the evocative images the thought of ending the yellow cancer gives, you take a deep breath and once again reply to the knocking.
"Who is it..."
>"Its Twilight."
"Huh? Twilight?"
>You open the door, seeing Twilight wearing a saddle bag containing a clipboard and looking up at you with a big dumb smile.
"Um. Why are you here--wait..." You stop yourself, "You're not here to guess my fetish too are you?"
>The question caught her off-guard.
>"Uhhh..."
"Because if you are, you can jolly fuck right off with Fluttershy."
>"Okay, No and RUDE. Good morning to you too by the way..." She replies sharply.
>You examine her face for a second, noticing a now more serious expression. Not to mention you've never gotten any rapey type vibes from Twilight.
>Can only hope that trend continues.
"Sorry, lately Fluttershys' been kinda annoying. Well, very annoying actually. I expected you to be her at first after a minute ago."
>"Yes, Fluttershy has an odd attraction to you." She says sheepishly, "I'm sure she just wants to be friends!" She waves her hoof and laughs nervously.
"She wants a hell of a lot more then that... Anyway, what brings you here?"
>"Well, I was reading-"
"Shocker."
>"And I had a thought, you've never been examined for any health issues since your arrival here!" She says, sounding excited.
"Health?" You wince, and gently pat yourself down. "No, I'm totally healthy. No visits to the doctor and getting prodded by god knows what for this guy."
>"Don't you get what this means Anon?" she asks, getting herself riled up. "I could be the first one who documents your medical adaptation to life in Equestria as an alien species!"
"Uhhh, huh?"
>She clops her front hooves together and lightly taps them while she giddily squeals and giggles to herself.
>"Oh the possibilities! Medical science has never had a scenario like this before! I could be awarded, or honored by the Canterlot society of higher learning! Or even..."
"Uhh, okay then." You take a half step back into your house as she rambles on. "Good talk Twilight."
>You slowly close the door, ignoring her detailing on how she can "examine" your body.
"She needs to get laid, big time." your mutter, turning away from the door and to the kitchen. "Now, breakfast."
>You make for the fridge, being abruptly halted mid stride by a purple flash.
"The fuck!?"
>"Of course, I'd have to get all kinds of physical samples first!" Twilight says with little sparks of her magic fading out. "It would require a little experimentation..."
"Twilight?? Get out! Just because you're a monarch, that doesn't mean you get to teleport whenever the fuck you want into my house! This is home invasion! Don't make me go all Chuck Norris on your fuzzy ass!"
>"Anon, please! This is for-"
"No! Out!" You point at the door.
>"Anon, be reasonable." She says, now getting a little frustrated.
"Reasonable?" you scoff, "Fuck that noise! Your in my house talking about experimenting on me and all kinds of crazy shit!"
>"Anon, this is for science!" She pleads, "I'll only do a few experiments at first..."
"Like what?" You hiss through your teeth.
>Twilight clears her throat and with her magic, grabs the clipboard from her saddle bag and begins reading off a list of medical sciency sounding stuff.
>"Lets see, blood sample, hair sample, skin sample, molecular structure analysis, biochemistry analysis, behavioral pattern analysis, emotional evaluation..."
"What the fuck."
>She ignores your comments and continues down the list.
>"Organic DNA pattern, astro pattern, psycho layer pattern, over dimension, parallel pattern..."
>Jesus. Its like she has a damn stash of medical exams shes been saving to perform on someone.
"Stop, stop stop stop."
>"Hm?"
"No."
>"No? To which one?"
"All."
>"But that isn't even half of them!" She says, ready to continue naming off more.
"I said no, dammit! I'm not gonna be your damn guinea pig!"
>Twilight calmly puts the clipboard back in her bag and lets out a drawn-out sigh.
>"Anon, you're making this very difficult. But I can't allow the expansion of science to be halted!"
"Oh no. Oh fuck no!" You stomp your foot, "I. Am. NOT, gonna be your fucking experiment!"
>"We're going to my lab in the castle and thats final!"
"Fuck you /and/ your castle!"
>"We're going and you'll like it!"
>Twilight raises her head, her horn glowing brightly while she does so.
"Hey, STO-"
>In a flash, you both vanish before you can protest any further.

>>
>Several hours have gone by. Who even knows how many exactly.
>The initial struggle after she teleported you both to her lab ended as abruptly as it started.
>You shouted racial slurs and every horrible name you can think of, and she simply gave a speech on friendship and why it can solve all your problems.
>Once that failed, it got physical. She of course won before it started.
>Magic'n shit.
>And now, you're here. Slowly letting your pride evaporate, only holding onto a sliver because of the hope that no one will find out about this.
>"Don't worry Anon, soon I'll have what I need and we'll be done for the day!"
"I should be way more pissed off but honestly," you shake your head, "I just don't fucking care anymore."
>You lay upright and slightly forward, suspended to a table with your arms up and feet spread. Tethered down by leather straps.
>Twilight had also taken the liberty to attach a bunch of little suction cups with wires protruding out of them onto various parts of your body.
>A few feet to your left was the machine that the wires were attached and feeding information to. Churning out a long sheet of paper with a zig zaggy yet steady line that folded neatly onto the floor.
>Atop your head was some big metal frame contraption like you hadn't seen since what Doc. Brown wore in the first "Back to the Future" movie.
>Attached to that were little light bulbs strewn about and blinking in no particular order, only changing in color every now and again to suit your mood or when you had a vivid thought.
>They were glowing red, bright, and fucken hot for at least a solid 2 hours brightening up the dimly lit room.
>All you thought of was how to get away with murder...
>The majority of any light whatsoever was that of the lights on the machine, along with the other various lab equipment strewn about all around the open space.
>And to top it all off, you were still in only your boxers. In a castle made almost entirely out of crystal. With no heating...
>Needless to say, you could make lemonade with your nips.
>"Hmmm, lets see." Twilight says monitoring her machines, "Doesn't seem to be anything out of the ordinary."
"Told you. Healthy. Can I go now?"
>"Hair, blood, and skin samples all come back negative for any abnormalities or dangers." She taps her chin and sighs, defeated. "I guess you're right, yeah you're pretty much normal."
"Yeah fucking fascinating. Let me go please."
>"Well I already have all the physical samples I need- ah!" Twilight narrows her eyes and bites her lip, eyeing your mid-section. "Except the most important one..."
>Twilight slowly walks over to you, her head meeting just below your waist.
"Oh god what now? You don't to take more blood do you? That needle hurt like a bitch."
>"No." She says, staring at your crotch. "Not that kind of sample..."
>Twilight's horn glows and grips the elastic on the front of your boxers.
"Heh-heyyyy what're you doing?"
>"Its simple silly," she says casually, "I need to collect a sperm sample."
"HELL NO YOU DON'T!!"
>She looks up at you, "Don't worry. Its for /science/!"
>With her magic she pulls your boxers down as far as they'll go with your feet as spread as they are. Stopping just at the upper thigh, letting ol'boy dingle dangle freely.
"C-Cut it out, dammit!"
>"You want me to stop?" She asks, looking back at you with bedroom eyes.
"YES!" You shout, now fully pissed off and turned on.
>She laughs and looks back down at Anon jr.
>"...No you don't~"
"God dammit!"
>Twilight adjusts herself, standing slightly upright on her hind legs and pressing her hooves on your hips.
>"There we go," She licks her lips, "comfy?"
"..."
>"Good!"
>Twilight doesn't hesitate, going straight to work on extracting your seed.
>She begins on the tip, wrapping the head of your cock in her tongue and engulfing half of your stiffening member in her lips.
>"Mm." She sucks hard and lets you out.
"Guh!! God..."
>"Not bad. Much different from normal stallion anatomy but from what it looks like and from what I've read on stallions, I bet the same things stimulate humans too!"
>She continues. This time however starting at your base, pressing her tongue against your shaft and licking up to the tip.
>The warmth of her mouth felt like a godsend compared to how cold you were just a second ago, her warm spit trailed down your shaft, onto your balls and down your legs.
>Your leg twitches, despite your efforts to hide how good it felt some things were entirely involuntary.
>She gives the same treatment to the sides of your member, coating you entirely in her saliva save for the topside.
>The cool air makes you twitch again.
"Ah!"
>"Don't worry," She says, gripping you with her hoof. "I'll make sure to get it all..."
>You say nothing. Only trying to hide your pleasure, which only makes her work harder.
>"Ahh..." 
>Twilight takes in the head of your now throbbing cock and swivels her tongue up and down on the tip, sending waves of pleasure throughout your body and tasting the pre-cum that she had already gotten out of you.
>"Mmm hm hm." Twilight giggles to herself, letting out little huffs from her snoot.
>You could feel her warm breath trail down your legs, following the wet trails left dripping from her mouth.
>She pulls you out again, pursing her lips and swallowing.
>"I told you this would be fun." She says while massaging your cock between the frogs of her hooves, "I didn't know that the pre-cum would have such a distinct taste... I should make a whole checklist just for sexual reproduction!" She says gleefully.
"J-just stop already!"
>"You're right!" She says in agreement, "I shouldn't stop now, theres more to go!"
"Fuck..."
>Twilight re-positions herself, bracing herself with her forehooves on the table squeezed against the sides of your hips.
>"I'll get ALL of it..." She whispers to herself, licking her lips.
>She takes in half again. Moving up and down your shaft and letting her tongue slide along the base of the head while she does so, letting you feel the smoothness on the base of your head.
>You notice one of her hooves slowly make it's way down to her hips. 
>Her body quivers. The self stimulation she gave herself made her shudder and moan. The vibrations of her voice pushed you just a bit further closer.
>Twilight stops half way down, eyeing the base of your member. A look of determination seems to form in her eye.
>She moves again, this time taking in your whole shaft down to the base.
>"Mmmm!" *ghk* 
>She holds, shaking her head and looking up to make eye contact.
>You try not to lose it right there, the sudden warmth and feeling of her taking it all in nearly did the trick.
>Your body shakes, no way you could hide /that/ feeling...
>Her head moves back, pulling you out of her mouth. Leaving a strings of saliva from her lips and tongue connected to your cock.
>"I..." Twilight says, catching her breath. "I wanna do that again..."
>She takes you in again. This time not pausing and going straight down.
"MM- F-fuck!"
>Your voice is signal enough for her not to stop. She goes from tip to bottom, slowly at first, building up speed.
>"Mmmm!" She hums in ecstasy. Rubbing herself while she goes to town on you, making a puddle of her juices begin to collect on the floor beneath her.
"T-Twilight..."
>You were getting close, she had turned up the pressure and was putting you on edge.
>She made no effort or gave any sign of stopping. Her eyes had clenched shut and she was moving from tip to base quickly now.
>Theres only one signal you can give her at this point to make her stop...
"Twilight!"
>"Mmmm! Mm-mm!" 
>You cant hold out much longer, the pleasure felt so intense all you could do was clench your teeth and ride this out.
"AGH! Gahhahhhh!!"
>Your hips buck hard and forward. Causing Twilight to wrap her forelegs around your waist and keep your member from escaping her grasp.
>"MM!"
>Your body twitches and writhes in pleasure, shooting streams of cum down the mare's throat. 
>She holds her position, making the effort to get out every drop she can until she eventually lets you out and gulps.
>"So much," She licks her lips, "was that because you enjoyed it? Or because you hadn't done that with a mare before?"
>You don't answer, only dead hanging. The only things keeping you from hitting the ground being the straps that fastened you to the table.
>"I even made myself climax." Twilight says, bringing up her hoof covered in her juices. "I can't wait to see what else we can do!"
>Twilight clops her hooves together excitedly before thinking to herself.
>"Oh Celestia... What time is it??" She says, sounding a little worried. "Oh no! I've got to get to Pinkie's for a party! How could I forget?"
"Gee, who knows?" You reply in between breaths
>Twilight looks at herself, "I'm a mess! I've got to clean up. Don't worry Anon, I'll be back for you later!"
"Hey, wait. HEY!!"
>With that, she teleports away in a flash of light.
"You bitch! Get back here and get me down!! ITS FUCKING COLD IN HERE!"
>Your anguished cry falls on deaf ears. Or lack thereof rather.
"God dammit!" You let your head hang down, "Why is it always the fucking quiet or nerdy ones that are the craziest??"
>To think. All of this could have been avoided had you just not answered the door.
>But you did anyway. Because of...
>Fucking Fluttershy.