Literal
It looked to be another amazing night in Ponyville. The Sun and any clouds that could have clouded the sky had made room to allow the Moon as well as its sidereal companions complete dominance over the dark plane. Anypony who had seen them out in that night had to agree that they deserved their individual spots in the sky. Princess Luna outdid herself night after night in designing a picture that would awe the tired ponies as it guided them home where they could claim their well-deserved rest. Though, in this moment, there was somepony who simply couldn't drift off into the land of eternal happiness no matter how hard she tried. A faint light coming from the top window of the library was the only indication towards the outside of what was going on.
Twilight Sparkle sighed when she looked up to the clock and saw how late it had gotten again. Something just wouldn't let her sleep this night. She flipped over onto her left side and mumbled, "What is it with me today?" as she turned one page forward in the book levitating in front of her. It was not one of the ones available in her library by any means. Rainbow Dash had given it to her on her birthday as a gift. Even if it wouldn't personally belong to her, something told Twilight that it was a bad idea to put on display a book whose back literally had You're of Age, Now Let's Get You Laid written on it. She had been understandably sceptical as to its contents, but under the cover, it was a fair love story, even though it played between two mares, which was a bit unusual in mass media.
She wasn't a homophobe though, of course, so she had been pleased to discover the story between Dusk Shine, an incredibly handsome unicorn, and Starlight, another more discreetly coloured grey unicorn. With them, she had already lived along through their shy first admittance of attraction, felt the rush of emotions when they had shared their first kiss, experienced the pain that crises damaging their young relationship brought with them, and seen the silent content upon forgiving reunion. That book was just what she needed, she thought. After passively living through all of what love held, she wouldn't need to experience it herself and could thus focus on her studies instead of having to try and charm anyone. She knew that was doomed to fail anyway, so she'd prefer to stick to a relationship which was actually functioning well. Perhaps it was working a little too well given that it wouldn't let her sleep, but she ignored that thought and read on.
Without a moment of further hesitation, the two came together into the greatest kiss of known history. Dusk had meant for it to be intimate, yes, but also brief, so she dedicated to it only after Starlight pulled her back in when she had tried to retreat and then proceeded to tickle on Dusk's lips with her tongue. She was never going to turn down a challenge, neither in sport nor in love. Thus, she gladly picked it up and pushed straight into Starlight's mouth without even giving her a chance to act first. She did relent eventually, allowing her love to take the offensive and force her tongue back where it belonged. They stood like that for several more seconds, fighting an intense battle for control over their cavities without either wanting to win while the hot air that came out of either's nostrils could not possibly compare to the heat that was already present on both of their faces
"Wow, they're really getting it on," Twilight whispered, hazily unaware of how quickly her own heart pumped blood to the front of her face.
At long last, they disconnected, though there remained a thin strand of saliva between them. They paused for a moment, lost in each other's eyes, until Starlight flopped backwards onto the bed invitingly and said, "Ready to take it onwards? I know I am."
"Wh- you mean, seriously and all?" Dusk stammered. A swish of Starlight's blonde tail was all that answered her, though it also said more than any words could. She was plainly overwhelmed by the sight. It wasn't technically anything new to her, of course, and she had even seen this particular instance of it before, but this time was different. Now that she knew it was finally about to happen, Dusk Shine was positively overwhelmed by the sight of her marefriend's deepest treasure. With a slight quiver, a drop of liquid clearer than anything she had ever seen emerged from the depths. As she watched it slowly run down towards Starlight's tail, Dusk finally awoke from her petrification, feeling the strong desire to not let that drop go to waste. Unfortunately, it was lost before Dusk could dive in, though she made sure that any further nectar would not meet the same fate, as big a task as that proved to be. With every one of her sloppy, unpracticed licks, Starlight moaned ever so slightly higher in pitch and seemed to excrete even more of her sweet juice than before
Twilight was at an honest loss of words at this sudden development. She wanted to quit here, to close the book and finally lay down to rest, but she simply couldn't overcome a desire she had not felt in a long time, the desire, no, need to keep going.
For several minutes, they remained in that position with Starlight having both of her front hooves on Dusk's head, desperately trying to urge her to go harder and faster. Meanwhile, Dusk was focused on learning all she could about her marefriend's preferences, intently listening for her reactions as she licked left and right and up and down. Starlight apparently reacted equally to everything though, so she instead focused her efforts on going past the surface, which excited the lying pony significantly more, judging by the sounds Shine had not expected her to be capable of producing. Thus, she did her best to reach as much of Starlight's insides as possible. The effect seemed to diminish over time, though, as her friend became increasingly quiet the harder she tried. Nevertheless, she would keep going until Starlight told her otherwise.
A few minutes later, it became clear to Dusk exactly why her marefriend had been so quiet when she suddenly cramped up and soaked Dusk's nose in even more liquid. Somewhat startled, she jumped backwards and watched as Starlight's body spasmed in seemingly random directions for a few seconds after she had met her peak. After that, though it could also have been an eternity from Starlight's viewpoint, she finally calmed down and sat upright to look at Dusk Shine. She then wiped off some of her remaining juice, gave a slight chuckle at the amount of it there was and said, "Yeah, maybe I should've warned you. Sorry, I guess. You did awesome, though." Upon seeing the lavender unicorn's neutral reaction, she regained at least some seriousness of her own and said, "Turn around.
"Ah, of course she's got to return the favour. They always do," Twilight murmured, trying to create an air of professionalism even though nopony else was around. When she tried to rid herself of sweat that had collected on her body due to the excess heat however, she realised that sweat wasn't the only liquid collecting on her skin. Sighing, she decided that she could just as well do something about it right away in hopes of the heat vanishing and letting her sleep.
"Wh- I don't..." Dusk tried to object, but she was helpless against Starlight's secret technique for silencing ponies around her which others may refer to as oversounding them.
"I know how you're feeling, and I'm gonna help you with that itch. Over here, next to me." Reluctantly, she obeyed Starlight's orders and sat down on the edge of the bed. Seconds later, she already regret her decision after Starlight had struck her with surgical precision, throwing her flat on her back and pinning her in that position, allowing free access to her already swollen mare parts. While one of her hooves had already found its way where it belonged, leaving Dusk gasping and meeping into a balled up portion of the covers, Starlight didn't leave it at that. In addition to caressing the obvious, she bent down to whisper certain things and nibble on Dusk's ear. "Feels good, doesn't it?" she taunted.
Dusk was beyond coherent thought. All she could focus on between the stars that overwhelmed her was submitting herself fully to the hoof that so gently massaged her burning lips. "More... harder..." she mumbled.
"Oh? You want it? Like this?" Starlight pulled her hoof up from the very bottom with extra pressure, enticing a brief shriek out of Dusk. "Oooh, I see. Y'know, let me try something. Does this also feel good?" she, very slowly at first, licked Dusk's horn from the base to the tip, went back down, followed its natural ripples, and flicked her tongue left and right on the way.
Dusk reached new heights she had not even been able to imagine. Perhaps horns weren't a sensitive zone, but she couldn't care less about whether she just imagined the pleasure that now intoxicated her mind from both directions, running up through her spine and down from her forehead. Even if she would've wanted to say anything, she couldn't. Sparks shot from the tip of her horn as she felt a vaguely familiar feeling approaching, though it was already a thousand times stronger than in any of her sessions alone
Irony struck hard and cold, Twilight found. She didn't have time to be bothered by it though as she brought in a second hoof to deal with her own issue while keeping the book aloft through magic. She had tossed the cover aside due to excess heat building up. The buildup was already making it hard to read on, causing her mind to occasionally drift off into a better place, and she felt that she could possibly finish it here and be done, but something told her she just could not quit. Thus, she kept reading to the best of her ability, even though her spell was already losing strength as all of her mind wanted to flee towards the heat inbetween her hindlegs.
Reading all of Dusk's expressions like a foals' book, Starlight quickened her pace even more, rubbing ever faster and harder. She obviously wasn't big on pleasing shafts, but Dusk wasn't shy to express her approval when the grey mare fully enveloped her horn in her mouth and began to move up and down. It went in surprisingly easy, which sported Starlight to go as fast as she could possibly manage.
Unfortunately, she didn't have fun for long, as Dusk finally had to abandon all resistance not too many seconds after that and gave in to the tsunami of electricity that ran down from her head and up from her hip, meeting halfway, then going back in both directions with the combined strength of both impulses. It blocked out all other sensations, stunned her, made her blind and deaf, forcing Dusk into a void where there was only the feeling of her pulsating love organs finally being satisfied and soaking the invading hoof in liquid. There was something else as well, but she couldn't identify until her first proper orgasm had worn off after a good ten seconds of just slightly twitching and revelling in the sensations. When she reopened her eyes and looked up into Starlight's face, she discovered that she had painted her friend's tongue green.
"Yeah, about that. You're... tasty. But would you kindly warn me next time? Ahead of time, maybe?" Her stern face faded into a smile, unable to remain anything but loving and tender with Dusk for more than a minute at a time, and she bent down for a passionate kiss. This time, she could swear there was something else in it, an unbeatable sweetness. She wondered what could be its cause until she took a tentative lick from what her marefriend had left on her hoof, then smiled and dove down yet again to share with Dusk the rest of her nectar. "Love you, my little egghead.
Twilight was gone. The book laid dropped, discarded, tossed into a corner of the room. She didn't need it, nor would she be able to use it if she wanted. Through ancient mating instincts, her world was reduced to how far her own body reached while both of her hooves were yet unable to quell the fountain of liquid coming forth from her. Figments of text raced through her head as she continued the scene on her own to get to a finish. She couldn't muster the willpower to keep her thoughts to herself, murmuring, "And they kept kissing... rubbing up against each other's places... Ngh..." The sounds of liquid being squashed between her hooves picked up as her pace did. She was almost there, she just needed a few more seconds.
And then something pushed her over the edge. She tore away her hooves, exposing her vulva to spraying her juices freely into the cold night air. "Oh, Midnight!" she cried out in ecstasy, though it seemed beyond odd to her once her orgasmic haze had worn off. "Just... Where did that come from?"
She couldn't question further for not a second after she had asked herself that, sleep had finally claimed her exhausted body, transporting her away from everything into a bright and vivid land exactly as her imagination.