Buck! What's wrong with you, Cadence? Pull it together! Cadence thinks, failing to watch the play in front of her. Ever since she had heard the news of Anon's arrival, she had had trouble keeping her mind off him. Pushing her front hooves further between her legs, she tried biting her lip to distract her from the itchy, hot feeling in her nethers.

Surprisingly, it worked, at least for a while. Bringing her attention back to the play in front of her, she was able to stifle her arousal. However, her mind kept wandering back to Anon, and soon her wings began to slowly extend, almost touching Shining and Twilight, who were, thankfully, unaware of Cadence's struggle.

Noticing the unpermitted movement of her wings, she let out a small, high-pitched sound, similar to an eep, and muttered: "Sorrygottagotothebathroom!" And quickly abandoned her seat, hoping that no one noticed the small puddle of fluids on her seat.

As the alicorn of love, one would expect that Cadence would be very sexually active. However, this was not the case. As a princess, she simply didn't have time to, and although she loved her husband dearly, and was very grateful that he gave her a daughter, she simply wished that he would pay more attention to her during sex, instead of finishing and going to bed.

In their entire marriage, they had only lain together three times, the first being on their honeymoon and the last two to try to have a child, which Cadence had hoped would take longer. The result of this was that Cadence had strong sexual urges every now and then, excluding her yearly heat, and she was very tempted to cheat on Shining at more than one occasion. Luckily, she also had a very strong will, and a plethora of different sex toys to please herself with.

But this time, it was different. Since she was in Canterlot, she had left her collection in the Crystal Empire, and she hadn't had sex for over a year. That, coupled with Anon, someone who she and nearly every mare in Equestria were undeniably attracted to.

Galloping through the Gala hall, she ignored the startled remarks of the guests, and rushed into a tall staircase, following the route to her personal room. Darn it! Why aren't there any public bathrooms in the Castle? She thought, charging her horn for a quick teleport. Closing her eyes to protect herself from the bright flash, she then found herself just where she wanted to be.

Sighing, she closed and locked the bathroom door, then cast a sound-proofing spell to keep any unwanted listeners away. Setting up a shower to mask the scent of her arousal on her coat, she removed her regalia and stepped in. As the warm water hit her face and neck, she leaned back on one of the shower's walls and began to relax, quickly settling her nerves.

I'm sorry, Shiny. I really am. She thought, before moving her hoof down towards her sopping wet marehood. Her mind quickly wandered to Anon, imagining how his hands would penetrate her, how his body was so well defined and muscular. Although he had never actually shown her his penis, she had seen it in the past. Smiling, she recalled her daily childhood activity, going to the royal gym with Anon to work out. Not only did she get to spend time with him, but she also was able to observe his strong figure, and in some cases, run her hooves over his shoulders and chest while he was weightlifting.

She shuddered at the thought, her hoof reaching an especially good spot. He never did have a problem with it, probably because he thought she was just giving his muscles support. However, after a while, she wasn't content. She needed more, and she found the perfect solution. Yoga. When she brought it up to Anon, his lack of interest wasn't surprising, considering that he already stretched before exercising, but after one cute pout, he yielded and allowed for her plan to take place.

The very next day, two mats were laid out in the middle of the massive gym, which was already rarely used due to the...lack of royalty. Cadence's mane and tail were tied together with small blue ribbons, and she wasn't wearing her usual gym attire (an ensemble of a blue breathable sports shirt, and short leggings, which accentuated her already curvy body. As she began her first yoga pose, she asked Anon to help her stretch, and she returned the favor, her light groping hidden under the disguise of a helping hoof.

They were both young at the time, with Anon being 16, and Cadence being only a couple years older. Although they were close, they never considered each other as siblings, but more like very, very close friends, as they shared nearly all of their classes together, Advanced magic control and Advanced Equestrian history being an example. Unsurprisingly, he aced every single one of his classes, mostly due to the fact that there were only three serious classes during the school day that lasted 30 minutes each, which was far less than he was used to on Earth.

Just imagining how Anon could be so intelligent at his age, caused Cadence to moan. For most ponies, Algebra 2 was a college-level course, and since Anon's pony IQ test result showed that he was considered a genius by their standards, he was placed into the 11th grade with her for 2 of the three classes he had, as he was taking Calculus BC at the nearby university.

As Cadence continued her little adventure in her memories, she suddenly noticed how much time she was taking in the shower, and her orgasm was fast approaching. Recalling her most treasured memories of Anon, she went back to think about how they went camping with their Aunt once. Since the bathroom door of the cabin didn't lock properly, her curiosity overtook her, and she peeked in. Anon was lathering himself up with shampoo, his ripped body making the view even more pleasant for her. When he turned to face her, she gasped. As she already knew, he didn't have a sheath, but it was not that that surprised her. In pony standards, his cock was massive. A thick, mushroom-shaped head adorned his long shaft, and Cadence couldn't help but imagine how large it would become if erect.

Not only that but also how it would feel thrusting into her, filling her awaiting depths like no other ever could, and when the came, he would release his desired seed into her. This proved to be too much for Cadence. Her hips thrusting towards an invisible human cock, she rode out an extreme orgasm, her juices gushing out of her quivering vent.

There she lay, catching her breath, and as she drifted off into sleep, she thought about the wonders she could have experienced, had she only stopped Anon from going on that cursed adventure...

Author's Note

For this story, I will have my own heights for the ponies. Since a pony is considered to be 4.8 feet tall or less, I can assume that most ponies are far underneath that threshold, hence (My little pony). This would mean that Celestia, who is the tallest of the little ponies, is also underneath that limit. I'll put her at 4 feet tall. Since Twilight is around half of Celestia's height, she is 2 feet tall, give or take a couple inches.

The same thing counts for penis sizes. I had my friend take the average penis size and height of a full-grown horse stallion, and the average penis size and height of a full grown pony stallion, at the withers, and he found that mathematically, the average penis size of a pony stallion is about 3 flaccid.

Of course, there is another variable to take into account. A stallion's sheath is only so long as his body can fit it in accordance with other organs, like the digestive system, and he concluded that the pony stallions do not have the space to fit a penis any larger than:

1 inch. AKA: Micropenis.

I mean, look at their bodies compared to the ones of real horses.
https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwityv7X6eveAhV7HDQIHSt4AdcQjRx6BAgBEAU&url=https%3A%2F%2Fwww.deviantart.com%2Fdashiesparkle%2Fart%2FVector-442-Shining-Armor-601533350&psig=AOvVaw2k79GfENx3VZEoVlK25ji0&ust=1543107515811027

https://i.pinimg.com/originals/e6/77/08/e67708994e5d86bfa7f0132e789d4ef8.jpg

Look at how in Shining Armor's picture, his chest is entirely filled with his heart and lungs, pushing the rest of his organs towards the back of his body, which fills in space where there would be a larger penis.

Data courtesy of a horse-porn loving veterinarian friend of mine. He might be a freak, I don't really know. He's kinda weird.

Also, if you ever read a fanfic where the horse penises are larger than that of a human, don't be sad, because horses only last about 6-8 pelvic thrusts. If you can last longer than 10 seconds, then you're fine.