It was a peaceful, cozy night here in Ponyville.

The light of the moon was illuminating the empty streets. The majority of the windows were dark, with only a few remaining lights here and there. Those still up by this hour were either insomniacs, or very, very busy.

It seemed that the librarian from the Golden Oaks library was mostly the latter, and possibly a little bit of the former. A faint, flickering light of a burning candle could still be seen through the balcony on the upper level of the library - a sign that the purple unicorn was once again staying up late.

Inside, Twilight Sparkle was sitting by her desk, a quill encased in her unicorn magic, and was writing down what seemed to be another series of scientific observations and reports. She hummed softly to herself, occasionally shifting slightly on the comfy pillow she was sitting on.

Nearby, her scaly assistant was fast asleep in his basket, snoring quietly and sometimes shifting around as well. After a long day of helping Twilight with various tasks in the library, Spike was more than happy to finally get some rest.

Twilight took a break from her writing to glance at him and watch him for a brief moment with a soft smile. She then looked at the perch that was usually occupied by her pet owl. Owlowiscious left a few hours ago to fly around and possibly get a late snack. Twilight looked through the open door that was leading to the balcony and observed the night sky for a moment, wondering if she'll manage to get a glance of him against the moon.

She shook her head and sighed, returning to her task. She was satisfied with what she got; the new file of her research was just a few sentences short from being finished, and tomorrow it would be ready to be sent to her beloved teacher. Twilight smiled to herself, taking the moment to indulge herself in a little bit of self-praise over a job well done.

As soon as the ink formed the dot at the end of the last sentence, she put the quill back into the inkwell and leaned back a bit to get a better look of her writings. Ten full pages of a complete report for Princess Celestia. Twilight beamed with the glee of an A++ grade student, a wild smile adorning her face.

She put the whole document inside one of the drawers, to make sure nothing would happen to it. She then let out a big yawn and stretched a bit. It was time to go to bed and get some well-earned rest.

Just when she was about to get up and make her way to the comfy respite of her bed, her ear caught some mumbling coming from behind her. She turned her head and noticed Spike shifting quite a bit in his covers. She raised her eyebrow; was he having a nightmare?

"Oh yes, Rarity...", Spike said groggily, "you are the... most beautiful pony in Equestria..."

Twilight relaxed and smiled a bit. Just another of Spike's Rarity dreams, nothing unusual.

She got up from her pillow and then set it on its usual resting place. She then headed for her bed, which seemed to almost beam in a very inviting fashion from all the moonlight. But just when she was passing by Spike's basket, another one of his mumblings got her attention:

"Oh my, Rarity... are you sure about this?... I wouldn't want you to do anything you don't want to do..."

Twilight stopped dead in her tracks. Was he...?

"You... you really like it? Even if it’s not… well… like a stallion’s?"

Holy Sweet Celestia, he was!

Wide-eyed, she quickly turned her head towards her assistant. She gasped and covered her mouth with her front hooves; right there, in the part of the basket where the lower part of Spike's body must have been, a rather noticeable, tall bulge was protruding from the bed sheets.

"Oh... ohhhhh... OHHH, Rarity!... I didn't even know you could-- AH! ...do such things with your tongue!..."

Twilight looked at the spectacle in sheer disbelief and shock, her eyes the size of plates and the pupils the size of pins. She took note of Spike being already a bit sweaty, and the way he kept shifting slightly, combined with his continuing, progressively more and more obscene mumblings, made the whole situation all the more unbelievable to look at.

She knew her assistant since she was a child. They got to know each other very well over the years, and by now, Twilight thought she knew pretty much everything about him, with no more surprises to be found in this small, scaly body. And yet here it was... the one aspect of not only dragons, but pretty much any known animal in Equestria that, in retrospect, was so obvious and extremely important. One that somehow managed to avoid crossing her mind even once, even in the form of a short, vague suggestion at the edge of her consciousness.

She sat there for a good while, completely speechless, and simply observed the completely alien behavior of the one person in her life she thought she knew to a T.

"Oh... ohhhh... Rarity... your hooves are like magic..."

She tried to recall the few times in her life when she attempted pursuing knowledge about these aspects of a pony's life. She realized that she never really paid much attention to this kind of stuff; when the class was studying biology, she always looked at everything from a purely technical, scientific standpoint. When they were having sex education, she was sick that day. When her dad tried to initiate the "birds and the bees" talk, she took it the "device A goes into the device B" way.

The one time she actually looked at these things the... emotional way was when she visited Rarity one afternoon for a nice, friendly chat over some tea. Somehow, the conversation eventually wandered into these areas and Rarity, after learning (to her shock) that Twilight isn't particularly experienced in them, decided to show her some of her more private collection. Twilight then spent the rest of that afternoon resembling the shade of a tomato as Rarity kept showing her more and more meanders of how two (and in some extreme cases, more) ponies can be intimate with each other. This was mostly limited to making their way through a book with lots of pictures, but Rarity had a few more things to show as well.

All of the knowledge Twilight got that day was, up to this point, kept locked in that section of her mind called "do not touch unless really needed, for your own sanity". And now, all of that shameful knowledge kept resurfacing as Spike and the imaginary Rarity seemed to slowly check off various positions from the long list of various intimate activities to engage in. Twilight realized, to her own horror, that she remembered the names of all the things they were doing.

As time went on, she became a bit accustomed to the sight of, well, excited Spike and the shock was slowly replaced with fascination - on both an emotional and scientific level. She didn't really know anything about how dragons mate, let alone having a chance to witness them doing it. Come to think of it, she never saw two ponies doing it, either; it was always just something she only looked at in a book. Therefore, she simply couldn't help but be curious - it was her first time seeing anyone doing anything intimate in real life, especially right in front of her.

She slowly took her front hooves away from her mouth and put them on the ground. She then gasped and looked down; she realized, to her shock and embarrassment, that she got so excited over this entire situation that she managed to make the ground wet. With her own bodily juices, coming from her own genitals. That was a mortifying feeling…

But... it was still tons better than that afternoon with Rarity, as she remembered just now...

During her educational session with the book, Twilight managed to make a huge stain on the sofa they were sitting on, to the point that it was dripping onto the ground. Probably only Rarity's good manners prevented her from commenting on it, although Twilight swore she could remember Rarity first looking aghast at the sofa, only to put on a hopefully comforting smile seconds later. Come to think of it, Twilight could also remember that when she was finally leaving the Boutique, she could hear Rarity shouting from the inside: "Sweetie Belle, can you please bring me a towel? And some air freshener?!"

Twilight brought her attention back to Spike. Judging from his mumblings, he and the imaginary Rarity were at this point in the middle of something involving lots of rope and leather. And whips. Twilight winced at the aspect; there were various interesting things she saw in that fateful book, but this category of kinky didn't lie among the things she personally found appealing.

She turned her attention again to the Mount Stiff, which towered over the surrounding landscape just the same way it did when she first saw it.

She licked her lips shakily. Sweat was dripping from her forehead and she was breathing deeply.

She felt an urge.

She never got a chance to do anything intimate. Ever. She seldom even thought about it. And everything she knew about it came from books alone.

And here it was: a brand new, unexplored area, a whole mountain to examine in detail, which arose in the middle of a previously familiar terrain.

Her eye twitched.

She wanted to explore it.

She raised her hoof to her mouth again, only subconsciously taking note of the intense smell she could feel coming from it as a result of being in contact with her bodily fluids.

No. She can't do that. That's Spike, her number one assistant. Still a baby dragon, even if by pony standards he should be considered an adult at this point. He's like a brother to her... sometimes almost a son. She wouldn't do that with her own son... right?

She kept sitting there, watching the inviting mountain in an almost hypnotized state while Spike kept asking Rarity to punish him harder for being such a bad, bad dragon.

Twilight licked her lips again.

It wouldn't hurt to just look at it... right?

Slowly, Twilight tried to raise from the spot she was sitting at for the past few minutes. She gasped when she felt her, well, moist hindquarters get in contact with a chilly breeze from the opened balcony. She turned her head to look at the aforementioned balcony, and the glow of her magic illuminated the room briefly as the doors were closed silently. She was too worked up at the moment to think about how Owlowiscious will get back into the library later on - there were more pressing matters on her mind right now.

She then slowly made her way around the basket, stopping only when she was facing both the fascinating bulge and Spike's head. She sat down, returning to her act of watching the former in silent awe. She wasn't paying much attention to what Spike was saying at this point; from what little made its way into her subconscious, she figured that Spike's scaly rear must be crimson red at this point.

She sat there for a while in silence. She tapped her front hooves against each other nervously, an anxious frown making its way onto her face.

It'll be just a glance, she reasoned. No big deal. But it's Spike... it would be wrong. What right do I have to look at it without his permission?

But then she remembered... almost every pony in Ponyville walks around naked. By this point, Spike probably saw the genitals of half of the population of the city. He must have seen her genitals so many times over that he could probably draw a perfect picture of them from his memory alone. It's only fair that she gets to see his genitals at least once too.

But... did he ever see anyone's genitals while they were aroused?

She could feel the sweat dripping from her, and a new stain of her liquid excitement forming beneath her. She licked her lips once again, her gaze locked on the bulge.

So inviting...

Having finally made a decision, she slowly leaned forward. She then encased the closest border of the bed sheets with her magic and, after taking a deep breath, started raising it up. She saw Spike's tail... then his feet... knees... and...

She let go of the bed sheets and looked away wide-eyed, so fast that she felt a sharp pain in her neck. With a wince and a quiet "ow!", she started rubbing it, hissing in pain.

She then looked again at Spike, who was still busy indulging in about every perversion she could think of. She got a thought that if the real Rarity heard all of these mumblings, she would... Twilight didn't really know what Rarity would do, but she had a feeling that it would definitely be interesting.

She sighed.

Okay... let's try this again... slowly.

She once again activated her magic to grab the sheets. Very carefully this time, she started lifting them up.

She could feel her heart pounding with every inch. The already familiar sight of Spike's lower body started unveiling itself, first the tail, then the legs...

And then she saw it.

She stopped dead in her tracks. Only a slight part was visible at the moment, but she could already see how it was connected to Spike's body; as she knew well, there were bright green plates going across Spike's entire belly, starting with his chin, and going all the way to the underside of his tail. On the lower part of his belly, more or less in the area of the crotch, two of the plates were sliding upwards and downwards, revealing a fleshy area behind them. From there, the thing was coming out and proudly towering over the surroundings, akin to a volcano that was ready to erupt at any moment.

Twilight bit her lip. A sweat drop ran down her nose. Her heart was pounding constantly, and her nether regions were leaking like a broken faucet.

She then got the courage to continue going upwards...

Holy Sweet Celestia.

She finally got it completely uncovered, and in a moment of slack-jawed awe, she dropped the bed sheets, letting them land on the upper side of Spike's body and keeping the thing perfectly visible to the world.

She stared at it in complete silence, only interrupted by Spike's continuing mumblings.

It's almost as long as his leg, she thought, her eyes once again the size of plates.

While overall quite similar to what an average stallion had in stock, Spike's member had quite a few notable differences, which were immediately picked up by her scientific mind. No ring in the middle of the shaft; numerous small bumps across its length, which reminded Twilight of some of the toys Rarity has shown her; the top lacking the cavity that divides one side in half; no visible, er, child factories; and also, it was very, very pink. Not Pinkie Pie pink, the... other kind of pink.

She licked her lips.

Spike took this exact moment to go back to his act of shifting around slightly. This caused his prize to wobble a bit with each movement. Twilight watched this little dance, completely hypnotized. Down below, what was previously a small stream now turned into a waterfall.

Her eye twitched.

I must touch it, she thought.

Slowly, as if trying not to scare a shy animal, she raised her hoof - taking note of the fact that by this point she was sitting in the middle of a puddle even bigger than the previous one - and moved it towards the thing. Closer... closer...

Twilight gasped and moved her hoof away in surprise.

It was warm. Very warm.

After calming down a bit, with her heart still pounding like crazy, she once again moved her hoof towards it and eventually, she touched it for the second time.

She couldn't help it but get a goofy smile on her face when she felt the warm, stiff shaft against her soft hoof.

It was indeed warm. It was the kind of warmth that a towel would have after lying on a furnace for a bit and then cooling down a little. It was an inviting kind of warmth. She liked that warmth.

Without really thinking about it, she started slowly rubbing the shaft. She bit her lip, feeling an indescribable happiness inside herself that was making her smile become goofier and goofier with each passing second. She could feel that although the member was mostly smooth, the little bumps across its length were adding something incredible to the already ecstatic concoction. Her mind reached a kind of a simpleminded bliss...

But then, something brought her back to the planet Equestria:

"Ohhh, yes, Rarity, I do love it when you rub it... please don't stop..."

Twilight stopped briefly. She blinked a few times.

And then, a devilish smile adorned her lips.

She started rubbing the shaft even faster than before. This caused Spike to moan - and, she realized, it wasn't the sleepy, groggy kind of moans from before, but instead a genuine moan of pleasure. This stimulated her ego in just the same way a word of approval from Princess Celestia would - a feeling of doing something right and feeling important because of it. And she liked that feeling.

She leaned closer and brought her second hoof to the shaft, starting to stroke the thing up and down, not too fast, but not too slow either. The resulting moans that came from her dragon assistant made her ego grow to a size that would put the Great and Powerful Trixie to shame. Each passing second made her feel as if something that was previously restraining her all her life was right now falling to pieces.

It made her feel free. It made her feel like a bad girl. One that does something she isn't supposed to, but doesn't care in the slightest. And she loved that feeling.

Now really put in a playful mood, she felt that just rubbing the thing wasn't enough. She needed to do something else. Something even badder than before and really put this show into motion. She pondered for a moment while continuing to stroke the member...

And then, she got an idea.

An awful idea.

She got a wonderful, AWFUL idea.

With a wide smile on her face that would make a demon from Tartarus run away screaming, she leaned even closer to the thing. Holding it tightly - but not too tightly! - in her hooves, she stopped when her muzzle was mere inches away from it. She let her tongue out of her lips and then, almost getting high on the magic of the moment, she touched the member with it. Very slowly, in what she thought was an unspeakable act of pure, unforgivable decadence, she slid her tongue across the entire length of the shaft.

"AHHHHH...", Spike moaned loudly, almost arching his back in half.

Twilight moved her mouth a few inches away. A wide, devilish smile once again adorned her face.

That was it. At this moment, everything else melted away, leaving only the desire to get as much of such loud, primal approval as possible. She was a star student, and she was going to get an A++ grade in this exam as well. And the examiner was going to love it.

With this massive injection of courage, she once again let her tongue out and touched the shaft with it, licking it the same way like before, but this time deciding to slide up and down with it. The accompanying moans of pleasure from her number one assistant made her almost drunk with pride.

The little bumps on the shaft were adding an amazing, if a little surreal, feeling that made her all the more willing to give this exam her best performance. The member, to her minor surprise, tasted a bit like strawberries. This reminded her that at least according to Rarity's book, stallion ones don't have a taste at all, maybe being a bit salty at best. Were dragons unique in that regard? Or was Spike doing something weird with it earlier in the day?

She then tried moving up and giving the top of the member some love as well. As she used the tip of her tongue to make circles around the glans, Spike seemed to be nearly having a seizure.

"Ohhh yes... OHHH yes...! Rarity, I LOVE you so MUCH!"

Twilight felt giddy inside. Such simple actions on her part and yet they were giving both sides so much delight!

She then took her tongue away to glance at the member. Why limit yourself?

And with that thought, she dived right in on it, in one sudden movement engulfing the member completely with her mouth. She kept her eyes closed for a moment, taking the time to get herself accustomed with this amazing feeling.

It's so... WARM.

Slowly, savoring this moment, she started sliding back up. She could feel the bumps brushing against her lips and her tongue while she did it. This, combined with the loud moan Spike let out and the nearly intoxicating taste of strawberries, made Twilight become completely lost in the act.

When she reached the glans, she started moving down again, taking note of the different, but just as amazing, feeling of the bumps going back in, all the while Spike kept letting out another series of moans. When she reached the bottom, she didn't waste any time and started moving back up, this time faster. And then down again, even faster than before. And up. And down. And up. And down. And up, and down, and up, and down, and up, and down, and up and down and up and down and up and down and up and down andupanddownandupanddownandupanddownandupand--

Suddenly, instead of a moan she heard a loud gasp.

Both she and her heart stopped in an instant.

Oh no.

Ohhhhh NO...

With an ice block inside her chest, she very, VERY slowly looked up...

Spike was awake.

And he was looking wide-eyed straight at her.

And, due to the fact that he wasn't particularly tall, his face was at best 10 inches away from hers.

In complete silence, the two were simply staring at each other speechlessly, without even moving a muscle. Some chirping crickets could be heard in the distance.

After what seemed like an eternity, Spike slowly looked down. Twilight then realized, to her pure horror, that she was still holding his penis in her mouth. And that Spike could see, from very, VERY close, her holding his penis in her mouth. And that she was holding it with both of her front hooves. And that she's leaning with her entire body over it. And that there is - he leaned to the right to see it better - a huge puddle underneath her, which was giving out, she just realized, a VERY strong smell.

Twilight could feel a tear forming in her eye.

...being thrown into a dungeon in the place you were banished to would be WAY too kind...

Spike looked at her again. Then at his penis. Then back at her. Then back at his penis. Then back at her.

He bit his lip and slowly scratched his head.

"So... um...", he started. He then shrugged. "Continue, please?"

Author's Notes:

The following are my personal thoughts on the story. You don't have to read it if you don't want to.

I had the overall scenario in my head for a while now, but only recently did I get the sudden idea to try writing it down as a story. The whole thing came out in one sitting, and, well, there are certain aspects of it that I simply didn't think through. It taught me a few important things, which will hopefully make my future fics better (well, assuming that I will write any). But it was certainly an interesting experience to write this story. I also wanted to thank everyone for their kind words and the overwhelming positive response, I certainly did not expect that to happen!

Am I going to write another chapter and/or a sequel, like so many comments ask me to? I feel inclined to say: probably not. First, I only had ideas for what happens up until the ending you see above, and I don't really have any solid concepts for the events that would follow it (besides "sex happens"). Second, like some people pointed out, the cliffhanger ending seems to wrap up the story pretty well, and I think I agree with them.

In the end, I wanted to thank you very much for reading my story and I hope you will be around when/if I write something new.