Derpy Writes Erotic Poetry; Twilight Gets to Deal With It

After Twilight winked out to Canterlot and Derpy left to update her shipping chart, Spike found himself alone, confused. What just happened? he wondered, walking over the writing desk upon which sat Derpy's poem. He idly picked it up, preparing to read. Yeah, technically he wasn't an adult yet, and so wasn't supposed to read it, but he was thirteen. He was a teenager now. How bad could it be? Surely he could handle thi...--Sweet Luna, they're doing WHAT to Heather? His eyes scanned the lines, his heart beating faster and faster as his face contorted into an expression of horror. When Big Mac entered the scene (and the mares), he quit. "Nope, fuck this shit. I'm out. I need a tea party with Sweetie or a petting zoo or a cotillion guide or ANYTHING to get THAT out of my head." He threw the paper over his shoulder in disdainful disgust, and it floated down gentle to the ground, where we, dear readers, could clearly see where we left off:

And it happens, that right around now,
Another pony decided to enter the fray
Big Macintosh hadn't gotten any action at all today.
And he had then just finished milking the cows
After squeezing the milk out of an udder
He wanted to squeeze his own semen out and get laid.

So Macintosh opened the barn doors wide, and the mares' legs wider still.
The sunlight shown on their magical orgy of bliss
But the red pony noticed there was something very amiss.
There were far too many fertile fields for one stallion to till.
So Macintosh ran with his earth pony strength up to Canterlot
To grab Shining armor, a good friend of his.

When the two well-endowed stallions returned to the place
Shining and Cadance winked at each other,
Then Rarity stuck her horn in the mouth of Twi's brother,
And Heather sat on Big Macintosh's very red face.
He felt his stallionhood rising to salute, and needed a place to jam it.
Indeed, it was times like this he most missed his mother.

This orgy went on for many hours, with breaks--of course--for tea
The barn stunk to high heaven with the sweat of riled up horses.
At six they all took a break for a dinner in four courses,
Then they went straight back to bucking each other instead of apple trees.
And the shouts of climax and joy filled the night air
As the ponies gave in to the carnal Dionysian forces.

Big Macintosh moaned at the center of it all
Surrounded by shrieking mares with sticky fish-smelling manes.
He had a quite amusing question enter his brain:
If Shining is pinning Twilight--his dick in her ass--against the wall
While I'm eating out Applejack's quite engorged pussy,
Which is better, the princest or wincest we've obtained?

Derpy, meanwhile was trotting away happily, already plotting her next lewd poem about snogging.