Anal Glands
Seems weird nobod notices this little anatomical detail.
Coach Gulurr saw it first, and quickly predicted the ensuing ruckus. Sighing, the wombat rubbed his eyes.
Riley, a 12 year old yellow labrador, had suddenly begun to slap his own ass against the ground, as if he was jumping on a plastic ball - and, as he wasn't, just landing awkwardly instead of bouncing. He was already jittery and actually twerked his ass much to the coach's annoyance, so it seemingly only confirmed the wombat's suspicions. Several kids were laughing at him, some trying to join him on the "fun" only to find that their pain resistance was much lower than the desperate pup's.
"Seriously dude, are you trying to get fucked or something?" said Sean, a 13 year old fox, "Coach, can you believe this little fag?"
"S-shut up!" Riley retorted, momentarily stopping before the itching forced him to continue.
"Alright everyone, to the showers" Gulurr said, "Time for some... special education."
With a bit of a fuss, everyone followed the coach's lead. Once they got there, Gulurr singled out Riley.
"Bend over" he said flatly, "probably best if you kneel on a bench."
Riley wanted to retort, but the coach gave him one of his famous death stares, so the pup gulped and kneeled on all four in a bench. As he did he started twerking, eliciting laughter from the other kids.
"Alright everyone, does anyone know why Riley is acting the way he does?" Gulurr asked, raising his voice.
"Probably because he doesn't wash his ass since he's a filthy slut?" Sean said, clearly intending to make the most out of this.
"I clean my ass I swear!" Riley barked, tears starting to form as the embarassment was getting to him.
"Aw, don't cry little fag" Sean mocked, followed by a few somewhat insincere laughs from his peers.
Gulurr sighed. He really wanted to snap Sean's neck, but he kept himself restrained for just a while longer.
"We'll be the judge of that, but most likely no. This can happen to any of you little shits, and you know why?"
None of the kids answered.
"Fucking Jesus. Its because most o' you have what's called anal glands. They're small internal sacs near the anus of most mammals, and most of the time they don't give you any trouble, since they open and close by themselves when you're taking a shit."
A few of the kids "ewwed" while others snickered.
"But sometimes, they get clogged and this happens. Now, they can be clogged for many reasons: infections, irritations or yes, not cleaning your fuckin' ass."
"Knew it" Sean said proudly, annoying Gulurr once again.
"What are they for?" asked Britney, a fucking prep.
"Mostly just to add extra smell to your shit, as if it needed that."
The kids' laughter was short lived as Gulurr sat on the bench next to Riley and suddenly lowered his shorts, sliding them down his tighs until they were just beneath his balls. The room fell silent, aside from a small whimper the pup made.
Gulurr spread Riley's cheeks, eliciting some gasps of shock from his audience. Though he was sweaty and a bit smelly the pup was telling the truth; in fact the coach could detect small traces of vanilla soap as he sniffed. He figured that the actual reason was indeed because of this, as the soap might have caused an irritation and closed off the openings. Such was the double edged sword of progress, Gulurr mused, now annoyed at himself for his pretentions. The inflated glands were just barely visible due to Riley's cheeks, but tiny little bumps were still there under his ring.
Gulurr licked two of his claws, and then gently inserted them inside Riley's ass.
"Ew, gross!" Sean said.
Feeling the glands up, Gulurr pressed them just a little, and they instantly poured. The musk's smell was felt long before it was seen, filling the puppy's bowels and just peaking out as a single drop of a yellow fluid. Riley panted and moaned, clearly thankful for the sudden release even as the humiliation consumed him and made him feel awful. His penis began to stiffen, and the coach's own pants began to tighten.
"Look, he's enjoying this!" Sean mocked, "You really are a little fag aren't you?"
Suddenly, Gulurr got up and grabbed Sean's neck. He then forced him to kneel, bringing his nose to Riley's ring.
"Lick it" the coach demmanded.
"W-what!?"
"Lick it, or I will break your fucking jaw."
"Y-you can't be serious" Sean said, tears starting to well on his eyes.
Gulurr simply gave him a look of pure hatred, and the fox reluctantly extended his tongue. It tasted awfully and brought tears to his eyes in full force, but there was something irresistible about it, that made him keep lapping while an urge to vomit built up inside him. This, plus Riley's moans of pleasure, made his own penis rock hard very quickly. His tongue entered Riley's ring, even feeling the inflamated holes within the hole, and his snout quickly became yellow.
"Aww, who's the little fag now?" Gulurr mocked.
He pulled Sean up, his look of hatred giving in to a more sadistic malice, kissing him on the lips. Sean's sobbing mouth opened slowly, the mixture of saliva, tears and musk intoxicating to both even if the fox resisted with all his might. The coach's hand rubbed Sean's penis, balls and asshole, and before long the fox was whining into his mouth as he released his load into his own shorts. Gulurr withrew suddenly, causing Sean to fall pathetically on the floor, crying as he finished his orgasm there.
The room was filled with shock and horror. Britney that fucking prep started to cry. Gulurr began to realise the extreme severity of what he did and panic rushed within him. He calmed himself with a few breaths, deluding himself into thinking everything would be alright.
"Classed dismissed" he said, looking at Sean with disdain one last time.
Suffice to say, almost everyone left the room in a hurry. Riley tried to get up to leave as well, but Gulurr's hand grabbed his ass, holding him in place.
"Except you."
Riley sniffed, his tail intinctively curling but unable to as the coach's thumb kept it raised. For a while Gulurr just stared, before his free hand groped Riley's cheeks one at a time, squeezing them, then softly raking his claws across the fur. Beneath the yellow coat the cheeks were clearly a bit red, due to the self-inflicted spanking. He groped again, his penis begging to be released but he decided to wait for just the right signal. Gulurr was screaming at himself, knowing fully well his life was already destroyed, but he kept going, transfixed by his lust. He reasoned that he might as well satisfy this crave, and he'd do it well.
Eventually, the signal came: Riley's butt twerking, the glands having built up enough again. Gulurr took off his shorts and lined with cock with Riley's asshole, one hand then holding the pup's hip hile the other kept grabbing his tail.
"N-no p-please!" Riley whimpered, though part of him wanted it if for no other reason as to relieve himself.
Suffice to say, Gulurr didn't listen, thrusting fast and eliciting a scream from Riley. The musk was released again, lubing the pup's ass and allowing the wombat to plow him with reckless abandon. Riley didn't feel pain, but the coach's thick cock felt awkward and a sensation of fullness only added to the feeling of violation. Furthermore, Gulurr's crotch was spanking him, making him feel even more degraded. Tears streamed down the puppy's face as he let out a whimper with each thrust.
The fuckery lasted for only a few minutes. Gulurr unleashed a powerful load in Riley's tight ass, prompting the pup to release his own, smaller one on the bench. Exhausted, the puppy's chest and face collapsed on the bench, though his hindquarters remained in place as the coach kept pumping. Eventually he pulled out, white and yellow ropes dripping from his still hard cock as he gently lowered Riley fully on the bench, ass up while the now softening cocklet laid to the side. The wombat walked to Riley's side, lowering his penis in front of the pup's snout.
"Lick it clean" Gulurr said, though it was more of a statement than an actual order as he shoved his dick on Riley's unwilling mouth regardless.
Riley's eyes were red from crying so much. Not only was it disgusting, but the actual taste was awful, the musk stinging his mouth while the semen was too salty. Yet, he craved it, his tongue's attempts to push out the cock turning into motions to genuinely lick it and swallow as much liquid as possible. Soon, Gulurr began to moan, thrusting his cock into Riley's throat until he unleashed another load, which the pup coughed out, dribbling from his chin into the bench and his shirt.
As the coach pulled out for the second time and got up he marvelled at how sexy his student looked, both ass and face matted with cum and musk as he laid violated and helpless. It'd take hours for his glands to swell up again, but that wouldn't stop the wombat.
"So now you know what to do when this happens" Gulurr concluded, fingering Riley's ass again, "You put a finger or more up your ass and push, okay?"
Riley nodded weakly, moaning as the claws went deep enough to tease his prostate.
"Or just lend your sweet little ass. It works well for me."
Gulurr slid Riley's shorts from his legs and threw them on the ground, then rolled him up gently, trying to not let him fall off the bench. The puppy was too tired to protest, so he just looked to the side, trying to tune out what was happening and to avoid the coach's lustfull gaze. The wombat turned his head up for a kiss, however, so he just opted to close his eyes.
Now in missionary position, Gulurr lined his cock with Riley's ass again. A small yellow streak run down his shaft.