*Gluk* *Gluk* *Gluk* (Luna/CelestiaxAnon's tasty sperm)

>You awake from a dead sleep suddenly aware that you are not alone in your bedroom.
>You hold yourself perfectly still, trying to assess the situation.
>You hear whispering voices.
>"Careful, you'll wake him up!"
>"Methinks I know a thing or two about getting around in the dark, sist--OW!"
>Ever so slightly, you open your eyes a slit and take a peek.
>Celestia and Luna are crouched at the foot of your bed, frozen as they watch you.
>You hold still, giving no sign you are awake.
>"He is a sound sleeper," Luna observes.
>"Maybe we can just... do it quickly while he sleeps and get out," Celestia says.
>"Hoh, a pleasant dream for him."
>What are they up to?
>"Still, 'tis an unusual natural resource to discover."
>"He's a magical creature from another world, Luna. I'm not sure he counts as a natural resource."
>You feel your sheets pulled from over you.
>Then your boxers are magically pulled down.
>Not cool!
>You sit up suddenly.
"Whoa, whoa, whoa horsies!"
>Two princesses go "Eek!" at your sudden movement.
>You stare at them. They stare back.
>Well, Luna's gaze slides down to your cock.
>Celestia speaks. "Ahem. I suppose you are wondering what we are doing here, Anon."
"It looks like you're sexually assaulting me in my sleep."
>"Well... of course... to the untrained eye, it might appear that way..."
>Luna interrupts.
>"We have come to sample your stallion juices, Anon!"
>"His human juices," Celestia hisses.
>"Human juices!"
>You stare at them.
"This has to do with Twilight, doesn't it. We were drunk! It was an accident."
>Celestia nods in understanding. "Yes, Anon, we know. Nonetheless, Twilight has reported that your... essence... creates a powerful magical surge when ingested."
>"Anon, it is our duty for the sake of Equestria to investigate these claims!"
"It was the alcohol! She was falling-down drunk and imagined it all!"
>"Nevertheless, Anon," says Celestia, "we must determine the facts for ourselves."
"Are you drooling? Celestia, is that drool?"
>She quickly draws a hoof across her mouth.
>"Of course not, Anon. This isn't about me, this is about doing what is right for Equestria."
>Crazy horses!
"Right, I'm outta here!"
>You scramble back from them, planning to dive through your window and make your escape.
>But damn, you had no idea alicorns could be so fast.
>In a flash Celestia has your shoulders pinned down to your mattress with her hooves.
>Luna has your legs immobilized.
>"Anon, calm thyself! Thy stallion emissions--"
>"Human emissions, Luna."
>"--human emissions must be tested for the sake of all ponies."
>Luna's head descends to your crotch and starts lipping roughly at your cock.
>She plainly doesn't know what she's doing, but damned if you don't have a hardon anyway.
>Her tongue shoves up against you, then she draws back and pokes at you with your hoof.
>"Twilight is certain we have to use our mouth? Because it is our opinion that this shaft is better employed elsewhere."
>"We're supposed to swallow his human-juice, remember? We can test elsewhere later."
>"We suppose," Luna says. Her lips return to fumbling awkwardly at you.
>Celestia watches, fidgeting. After several minutes she can take no more.
>"Ugh! Let me do that, Luna."
>In an instant her muzzle shoves her sister aside and engulfs you into her warm, wet maw.
>You shiver in pleasure as her lips wrap around you and she sucks at you.
>Her tongue slides around your shaft and wrestles with you lovingly.
>In spite of everything, you feel yourself respond, releasing a steady drip of your pre into her welcoming mouth.
>She moans at the taste of it and enthusiastically moves her head up and down.
>She is salivating like wild, drooling until your whole crotch is soaked.
>She's... rather experienced, you realize.
>Luna watches, impressed, as Celestia works you hard, drawing you inexorably toward ecstasy.
>It doesn't take very long before you feel your orgasm surge.
>You gasp, as your cock twitches and spurts thickly into Celestia's mouth.
>She slurps and swallows desperately.
>You're in heaven.
>Celestia's eyes blaze whitely. Her body is enveloped in a golden glow. She lets you slide from her mouth as she stands, magic crackling in the air around her.
>"INDEED, TWILIGHT'S REPORTS ARE CONFIRMED."
>Luna looks up at her, impressed.
>"I AM AWASH WITH POWER. ANON IS TRULY A PRECIOUS RESOURCE."
>She looks down upon you, her figure majestic and godlike.
>"ALSO, DELICIOUS."
>"My turn," Luna says.
>Celestia nods as her sister gobbles you into her mouth.
>"WE SHALL HAVE TO RUN MANY TRIALS TO PROPERLY UNDERSTAND THIS PHENOMENON," she says.
>Goddammit, she's drooling again.

Part II

>You're sitting down and having a sandwich when there is a sudden pounding at your door.
>(Lately, Celestia and Luna have been insisting on a special diet for you.)
>(A weird mix of magical plants and nuts and shit.)
>("Volume enhancement," they explained evasively.)
>(Not that it wasn't obvious what they meant.)
>(It's not actually a horrible diet.)
>(But damned if you'll deny yourself your peanut-butter and banana sammiches.)
>You take a bite of your sandwich and try to ignore the insistent pounding on your door.
>"Anon, we know thou are about," calls a voice.
>"Danger threatens Equestria, Anon! Will you not rise to the call?" says another.
>Sigh.
>They're going to break down your door at this rate.
>Just like they did last week.
>You get up and open your door, doing your best to look intimidating.
"What is it this time?"
>Celestia and Luna stand on your porch.
>They both have an eager look on their faces.
>"Anon," Celestia says, "know that we do not come to you lightly; but rather, because Equestria's fate rides upon your shoulders."
>Luna is staring at your crotch.
"Uh huh."
>"A treacherous, sneak attack from the... umm..."
>"Windigoes," offers Luna, just as Celestia says "Griffon Empire..."
>They look at one another in alarm.
>Luna makes the save. "What Our sister is saying, is that the Griffon Empire hath harnessed a windigo..."
>"...And so, we, no, Equestria has need of your--"
>"Your luscious seed," Luna breathes.
>"--your magical essence."
>Celestia's magic tugs at the zipper on your pants.
>You back up, intending to slam the door on them, but they push in with you before you can do so.
"Didn't you defeat a windigo last Tuesday?"
>"That was a different windigo, Anon."
"And the Griffon Empire attacked on Wednesday..."
>"Truly, they know not when to give up, Anon."
"Then the changelings on Friday..."
>"A very tricky business, that," Celestia says.
"And Tirek attacked three times last week."
>"A most resilient foe," says Luna.
>You feel their magic lift you and pull the clothes off your body.
>Resistance is futile!
"You know, none of these events has been mentioned in the papers!"
>"Thou must be taking the wrong papers, Anon."
>"Err, we wouldn't want our little ponies to panic, so we have kept the reporting to a modest article here and there in the back of the paper."
>"Oh. Yes. 'Tis what my sister says."
>They set you back on the floor, and nuzzle straight into your crotch with fascinated little licks and caresses.
>Anon Jr., the little traitor, gets hard almost immediately.
>Celestia and Luna kiss at your shaft, and then begin to slide their tongues along you in long, wet strokes.
>You can't deny how good it feels.
>With frequent experience, they've both grown quite skillful in pleasuring you.
>Now Celestia takes you into the warm cavern of her mouth as Luna lips gently at your balls.
>Thrills of delight shiver through you, and then she slowly slides you from her mouth, ending in a passionate kiss to the head of your shaft.
>Now Luna sucks you deep into her own muzzle, sucking forcefully at you until you gasp with pleasure.
>The two of them alternate their oral worship of your cock, wetly trading it from mouth to mouth.
>Their saliva and your own steadily increasing dribbles of pre coat their faces and spill down your thighs.
>You run your fingers through their manes, and trace the whorls of their sensitive horns as they work at you.
>As you feel yourself getting closer, you sometimes grab whoever is currently sucking at you by the head, and roughly face-fuck them.
>Celestia's gives little delighted squeaks when you do this, while Luna moans with a deep hunger.
>Both of them struggle to bring you to ecstasy, desperate for the taste of your sperm.
>And you, you're caught up in it once again as well, the need building in you to give them exactly what they've grown addicted to.
>You quiver on the edge of release.
>Lips and tongues and kisses and licks blissfully torment you.
>And then you feel your moment arrive.
>You shudder and gasp, as the cum surges in your cock.
>The first thick gush sprays into Celestia's mouth
>She gags, and then gulps it down.
>She lets you loose so that Luna can clamp her lips to you to taste your second pulse.
>You let loose a torrent across Luna's tongue.
>Your diet-enhanced capacity sends pulse after pulse streaming from you.
>Celestia and Luna glow in the surge of magical power your seed triggers.
>The princesses trade you back and forth, sharing you. Sometimes, perhaps deliberately, they misjudge, so that you end up spurting a generous serving of your cream across their faces.
>Eventually, the last dregs of your pleasure dribble from you, and you pant as you try to catch your breath.
>And that's when you hear your door slam open again.
>"Anon, it's an emergency!"
>It's fucking Twilight Sparkle, bursting into your home!
>"Anon, Celestia has gone power mad and transformed into Daymare Sun! I can only fight her if you let me swallow your sweet, sweet nectar to... oh... uhhh...."
>Only then does she notice Celestia right in front of her, licking the white slime of your cum from Luna's face, while Luna struggles to catch up a thick dollop of the same as it drips from Celestia's throat.
>"Well... crap," says Twilight. And then, shyly adds, "Can I have some too?"