Author Note: This is a small collection of shorts that takes place in the same universe as my story 'A Day in the Life of a Pony Centaur'. Here we explore the fates of a few other centaur mares in the same world.
Belladonna, the racing centaur
A racing centaur mare's training begins as soon as she's selected to race, generally at the age of eighteen. The mare we are following today is named Belladonna, and she is excited and proud to be accepted for training.
A metal shield is installed permanently over her clitoris. The shield leaves a sizable gap between the shield and the sensitive flesh of her clit; this allows access to the clit via specially-designed toys for reward purposes, while discouraging the mare from trying to satisfy herself.
This is considered essential to the training of a modern racing centaur, as it both provides excellent incentive for training and also prevents embarrassing scenes such as the infamous interruption at the Ladies Cup of 2012, when the leading centaur Lilybelle disrupted the entire race by mounting the plastic fence along the side of the racetrack and rubbing her clit along the railing to stimulate herself to orgasm.
Although the mare's behavior was found to be the result of poor husbandry practices, including allowing Lilybelle's jockey to make sexual use of her immediately before the race, the incident was such an embarrassment to the centaur racing industry that any racing mare not wearing a permanent shield is required to wear a temporary chastity device during any official race to prevent a repeat.
Belladonna accepts the installation of the shield with pride, as it marks her status as a proper racing mare and means she will be moved to the training stable to live alongside other older and more experienced racers.
When she arrives, she discovers that it is common for the older mares to engage in some good-natured hazing of new trainees: she's surrounded in the yard and one of the older mares massages and fingers her pussy until she's gaping and dripping, begging for the other racehorse to keep touching her. Then she's ridiculed for her slutty response and spanked until her pussy throbs. The trainers and jockeys don't interfere with this, as it's considered a natural bonding activity; if the mares aren't allowed to establish a natural pecking order amongst themselves, fights break out more often among the frustrated centaurs and are more likely to result in injury to the valuable animals.
Belladonna accepts the ritual with good humor the first time, but when it happens again and again over the following week, she becomes discouraged, feeling humiliated and rejected. Soon, she's failing to display the appropriate enthusiasm on the training track. Her trainer introduces her to the encouragement harness.
The harness fits around her hindquarters and is attached to a stallion-sized phallus that slips inside of her aching pussy. Her own movements as she runs around the track make the toy thrust into her, but there's also a motorized component that responds to her speed; the faster she gallops, the harder the toy vibrates.
Belladonna is initially ecstatic. She doesn't understand that this is a punishment. The toy feels amazing inside of her, and the faster she runs, the better it feels.
But it isn't long until she encounters the natural limiter: her own instincts. The closer she gets to orgasm, the harder it is to keep running; her body wants her to stand still and brace, the way she would when being mounted by a stallion.
Her first training session with the encouragement harness on reduces her to a sweaty, shuddering mess, as she frequently stops mid-lap and braces herself in the middle of the track, gasping and then whimpering in disappointment as the toy goes still and silent inside of her in response.
Soon she's begging her trainer to take it off. When she's informed that she will wear it for training for the rest of the week, she cries, and receives a disciplinary spanking for the disruptive behavior.
By the end of the week, she's growing used to the constant stimulation. She knows what speed she can run at and sustain for a while without getting so close to the edge that she'll have to stop. But she's also becoming increasingly desperate, her body heated, her mind preoccupied almost obsessively with the idea that if she could just keep running for long enough, she'll come.
So, on the last day of the week, she tries it. In the middle of a training session, she breaks into a faster and then a faster gallop, whimpering in pleasure as the toy buzzes faster inside of her. She focuses on the movements of her hooves, bullying her body into moving even when it wants more than anything to stop and just experience the sensation of being fucked. An amazing orgasm builds inside of her as she gallops frantically around the track.
As she finally tips over the edge and starts to come, she screams victoriously, but she also loses her iron grip on her control over her body. She nearly trips over her own hooves as she slams to a stop.
"No!" she screams as the toy goes still inside of her again, her body clenching and shuddering in confusion as the pleasure slips away. She forces herself to take a few shaky steps forward, making the toy buzz in her in soft little bursts, and sobs as the faint pleasure only tingles inside her, little echoes of the orgasm she had been expecting.
The other mares sharing the training track with her snort in disgust as they gallop around her. They all remember trying something similar, when they were first introduced to the encouragement harness; they know what she's feeling, and they have no sympathy for the whimpering mare. One kicks at her flank to get her out of the way. She limps haltingly to the side of the track, her pussy visibly shuddering and clenching around the sporadically buzzing training toy.
That will be the closest that Belladonna comes to a climax for at least a year. She fails to place in her first race, which means that, despite all of her hard training, she gets no reward; instead, she gets to stand aside and watch as another mare in the stable, an older racer who's finally managed to place, receives her own desperately-needed release.
The rewards are given out in the main yard, so that the other mares can be reminded of what they're missing out on when they fail to perform. The trainer wheels out a mounted toy--a stallion-sized rabbit vibrator, designed to work under a racing mare's clit shield. He adjusts the height of the toy while the lucky mare dances in place, nervous and excited, and then turns on the vibrating mechanism.
Then--watched closely by her jealous stablemates--she backs herself onto the toy, squealing and huffing, her flanks heaving, until the vibrating cock is fully seated in her and the tickling prongs slide under her clit shield and dance against her clit. Almost immediately, she's hollering out her first orgasm, braced and shuddering, her muscles cording up with the power of her pleasure.
"Yes!" she bellows. "Yes, this is it! This is what it feels like to fucking win! Fuck! Fuck! Oh, fuck, my clit! Yes!"
Belladonna and the other unlucky mares watch as the winner grunts and groans and shouts her way through upwards of three or four orgasms. When the trainer comes back over and shuts the vibrating machine off, she still cries out in dismay, stamping her hooves and trying to mash herself harder back against the toy, trying to grind out one final come, but the trainer spanks her until she squeals and pulls off the machine to dance away, leaving the machine and the dirt beneath it wet with her fluids.
Belladonna goes to bed that night, pussy aching, clit twitching, and resolves to win her next race, no matter what it takes.
***
Millay, the farm centaur
Millay lives a quiet and lonely life. She's the only centaur on a small farm, purchased cheap due to her dowdy appearance and dull brown coat; not well-bred enough to race, not flashy enough to show off to tourists.