Warnings: torture, fleas, poison ivy, needles, injections, toddlers, male, female, orgasm denial, bondage

Constant, muffled sounds of whining and moaning could be heard coming from the large shed. The cause of the sounds could only be seen after going further inside. Lily's eyes moved over the form of the bound anthro fox in one of the stalls. The adult anthro was a prime example of a perfectly fine young male, which contrasted with the plant girl, who looked more like a toddler in comparison. The fox was forced to stay on all fours, immobilized by belts and metal bars and a loud whine could be heard from his gagged mouth as lily's hand gently stroked over his throbbing cock from behind.
Lily carefully collected a couple droplets of the fox's precum in a small jar. She could feel the cock bulge out to it's very limits. One more stroke, two more strokes, just as he was about to explode with a blissful orgasm, the tiny, dexterous hand moved away and lily watched a few black specks migrate from the fur of the foxes' balls back onto his awaiting, throbbing cock. The fox strained in his bonds, letting out a series of muffled cries as the nearby orgasm instantly turned back into a fiery, consuming itch. The fox's arms struggled desperately, seemingly to make himself orgasm but in truth much more so to relieve himself of that intense, torturous itch on his tender parts. Lily smiled and patted the fox's shapely buttocks.
"Mmm, that's got to really itch you sexy boy" she giggled, "I bet you really want to scratch those itchy parts of yours, don't you D?". Lily's eyes moved over the fox's throbbing cock and shapely scrotum. On closer inspection one could see that the cock was covered from the tip to the end with countless little red bite marks, some more swollen than others, which travelled further over the fox's whole nether region. Lily giggled again "Ok, I think it's time to finish this up for now, but I have something special for you today."
Lily's hands grabbed an innocent looking pile of leafs and she started to slowly massage them into the fox's throbbing cock, still careful to not accidentally let him cum, "Poison ivy", she noted with another giggle, nodding with satisfaction at the fox's muffled struggles. Once lily was done rubbing the leafs all over the fox's cock she put them to the side and her hands grabbed the final item on the list, a specially shaped glass container which would go over the fox's tender parts, and which was filled by a swarm of crawling fleas. "Need to put these fleas back on you, and no, the few that you have on right now don't count." Soon enough, the tiny hands fastened the container tightly onto the fox with supplied straps. Lily's hungry eyes observed with satisfaction as the countless black creatures swarmed back onto the awaiting, throbbing cock. The fox's mouth let out a series of intensified, muffled cries and his butt danced, as much as it could, to the overwhelming itch and repetitive little stings all over his most sensitive spots. The fox couldn't think of anything else but the constant, endless itch. He wished for nothing else but to scratch, but that would not be allowed, not any time soon anyway, given that lily planned for this specific test to take at least a few weeks, maybe months longer.
Once finished, lily decided to see how the others were doing.

In the nearby pan, muffled whines of a much younger test subject could be heard, as well as giggling of another cub, who sounded to be of an age similar to the whining one. The victim this time was a young wolf cub, and sitting behind him was a grinning fox cub of similar size and age. The fox cub stroked his finger down the other cub's throbbing cock, careful to not brush the fleas off, and giggled at the wolf boy's loud whine of need.
"It would feel really nice to have it stroked, wouldn't it, Shadow?", he gave it another stroke with the tip of his furry finger, "but then it would itch even more after it's over". The fox's slim fingers moved upwards to the wolf's butt and pushed inside without a warning.
The wolf cub moaned as the fingers fucked his butt for a moment. With the constant, overwhelming itch, which he wasn't allowed to even scratch, even the pain of raw penetration felt like relief. But even this wouldn't be allowed to continue, as, soon, the fingers left the whole and moved back to the cock. The fox's hands brushed some of the fleas off of the wolf boy's cock, exposing the bumpy, red surface, and the wolf moaned with pleasure when he felt his boyhood suddenly enclosed in a warm, moist orifice.
"Mhhh, mhhh", the boy struggled in his tight bondage as the fox's mouth stimulated the engorged, itchy organ. The fox's hands grabbed tightly around the base of the wolf's cock and balls as his mouth continued to move up and down the cock's shaft.
The fox could tell the wolf boy was about to come so he slowly moved his mouth off of the cock and let it throb for a moment, only to give it a long sloppy lick, once the danger of an orgasm was once again over. The fox grinned, "I think once we are over with today's session, I'll bring you another jar of fleas. I think you'd love to have a double dose of these itchy ones on your parts." The wolf's whines intensified as he pulled at his bonds, the terrifying vision of even stronger itching hard to even imagine. The fox giggled in return "I'll take that as a yes."
Lily sat by the cute pair of boys and relaxed, watching the fox repeatedly bring the wolf to the very verge of an orgasm, but never allowing him to reach one.

A few minutes later, a knock could be heard coming from the stable doors, and Lily's eyes travelled from the the sexy view of the continuing stimulation of the wolf boy's cock, to one of the other cubs playing nearby.
"Shoko, could you go get that?" Lily said, looking at a very dirty slug-girl, who was lying on the hay, masturbating, seemingly oblivious to everything else happening nearby. The slug girl, who looked around the age of Lily, moaned, then pushed herself up and saluted with a giggle, "will do!"
"Shoko was a pretty little thing, with a slug-like tail and a set of soft antennas on her head. She was as dirty and smelly as she was pretty, too." The slug trotted over to the doors, only to find a large, adult, bull-looking fellow glancing at her from the outside.
"Uhm, hello mister bull, are you interested in the testing?"
The bull stared at her, his cock visibly growing, "Oh, yeah, about the voluntary test subjects. I'm a tauren." He waved the advertisement before her face "It said this also comes with other things like blowjobs and masturbation"
The little girl smiled "Great, I'm Shoko, what's your name Mister...?"
"Charlie, Charlie Rainsorrow"
The slug grabbed the tauren by the hand and pulled him inside, revealing a view of depravity, bondage, and moaning. "Don't mind them, they are here for prolonged testing, and the others are here for fun." She pulled him into a free stall, "If you can wait here for me and uhm, would you like it with bondage?"
"No bondage please, I'm good."
The slug girl nodded and walked out of the main room only to come back after a moment, with a jar of black specks in one of her hands, and a can of spray in the other and waved at the tauren, "So, about the rules of the test. You'll get your tender parts stimulated but you aren't allowed to cum or orgasm, also you'll get fleas on your tender parts. Later we'll be collecting your precum."
The tauren looked stared at the slug curiously, "Mmh, ok, so what should I do?"
Shoko giggled, "If you may get down on all four, I'll stimulate you from behind, then I'll spray you and place the fleas on you. The spray is a mixture or stuff with some feromones, to make the fleas stay on you and bite you more." She motioned the muscular male down and kneeled behind him. "For now relax please", Shoko placed the two items to the side and her hands rubbed skilfully over the tauren's muscular buttocks, "mm, you're such a sexy big guy," she giggled.
The girl's hands grabbed onto the two meaty buttocks and pulled them apart, only for her tongue to sink into the brown hole at the centre. The tauren moaned pleasurably. Shoko's fingers moved down, one hand wrapping around his balls and giving them a slightly painful yet stimulating squeeze, while the other hand wrapped around his already hard cock and started to stroke. The slug's moist, warm tongue drilled deep into the anus, "mhh, sho nice", she moaned softly. The childish hands continued to stroke and pleasure the tauren's maleness skilfully for a while, as she listened to his rising moans of pleasure. Finally, when Shoko was sure the tauren was just about to cum, she moved away. She giggled at the whine of denial as the throbbing cock jumped desperately in the air, "Ok, time of the fleas!"
The skilfully cubby hands quickly grabbed the spray and spent a moment carefully spraying everywhere around the male's cock, balls, and even anus, and his whole buttocks for good measure. "I'm going to put the fleas on you. The whole test will take until the night, you will have to stay still while the fleas bite you and make you itch. I'll pleasure you every hour or so, maybe more often if needed. Let's start with the itchy part, are you ready?", she giggled. The bull gave an unsure nod. 
Once the little hands opened the jar swarming with the black fleas under the spray-covered manly parts, the fleas instantly moved onto the awaiting flesh, and swarmed over the bull's cock and balls like a black, wriggling blanket.
The bull whined and his ass wriggled as countless little mouths started biting into his tender parts, and soon he could feel a furious, overwhelming itch cover every little part of his exposed dangly bits. The bull whined again and his ass wriggled some more, he wished for nothing else but to rub and scratch.
Shoko patted his wriggling behind as she watched the fleas crawl over his balls and cock, leaving little red dots wherever the tiny mandibles bit into, "Remember, no scratching, or you'll ruin the test, and we'll have to think of some punishment. I want that whole sexy cock of yours covered in little itchy bite marks by the end of this hour.".
The slug girl looked towards lily, "We'll need some more fleas in case someone else comes by."

Lily nodded and looked over the shed, until her eyes fell down onto a young female skunk, who was deeply concentrating on licking her own two little feet clean, visibly enjoying the activity, "Hey Uru, could you go get some more fleas? and do the injection while you are at it." Lily had to repeat the question twice before the girl's eyes looked at lily with a glazed expression.
The girl giggled and quickly stood up with a nod, "Uhm, ok! I'll be right back!". The little skunk feet walked out of the room, into the nearby, much smaller, darker room.
The skunk girl's eyes glanced around until they felt down onto the main feature of the room, a table with a small, black container in the centre. The girl walked to the container and slowly unbuckled the various belts and clamps holding it's lid close. Finally, she opened it up. A wave of heat passed the girl's face, and her ears filled with a stream of quiet, desperate moans. Her eyes glanced over the form of a 2, maybe 3 year old otter girl, so tightly bound inside the hot, sound-proof box. The bound cub's body was kept immobile by countless belts, straps and cuffs. Uru's eyes moved from the bound cub's blindfold, down to her large gag, and then onto the main feature, her unnaturally large pussy and what was placed over that pussy, a large, transparent container completely filled with fleas. Uru tapped at the container and winced a little as the black specks swarmed around the bound toddler's giant clit. The little, or not so little, button seemed completely covered with little red dots and bumps, and Uru could see the bound cub's body tremble with desperation, as much as it could with all the bonds, "hehe... that's got to itch so bad..."
The skunk girl's eyes looked over the room until she found a chair with a set of various tools. She grabbed an empty jar and a can of special spray, and proceeded to spray the substance over her hands. She walked back to the bound toddler and tapped again at the container, watching the fleas wriggle and bite all over the toddler's spread-open, engorged pussy flesh, especially that large clit and the large inner labia which they seemed to like the most. The container had a built-in round hole with a lid, so she opened that lid and placed the jar nearby, until some of the fleas migrated inside the jar. The amount of fleas in the pussy container was so dense that even taking a jar of them didn't seem to decrease the main swarm at all, they were covering the whole exposed flesh like a thick, black, crawling, itchy carpet. The rest of the fleas seemed content with their habitat and unwilling to leave even with the container open.
Uru placed the jar with newly acquired fleas to the side and walked back to the chair.
She grabbed a syringe and a jar of green liquid, and filled the syringe with the liquid, only to walk back to the immobilized toddler. She tapped at the container once more, "Ok, time for your little injection. I know you don't like it much but lily insists I inject it into your clit every time, so here you go". The skunk girl looked at the syringe, the substance inside was a strong stimulant with the function of keeping the bound toddler all that more sensitive, aware, and conscious, while at the same keeping her healthy, it was a little wonder of science designed by lily and customized specially for this test and this specific cub. Uru gently brushed the fleas of the otter's large clit and centred the needle at the centre of the sensitive nub. She slowly forced the thick needle into the flesh and gently injected the whole syringe of the substance deep into the toddler's sensitive spot.
The little body whined loudly through the gag and the little limbs rattled in the bonds, trembling as much as they could. The injection itself felt like molten lava burning the inside of her large clit, every single time. If anything, with every new injection it felt worse. It took a few seconds for that overwhelming burn to slowly subside and then the worse part came. A wave of electric feeling passed through the toddler's whole nether region and suddenly, the itch which she thought couldn't get any worse, got a few times worse. The toddler could feel every little flea bite on her tender parts explode with itchy fury, while her brain focused on it more and more.
Uru let out a slightly nervous giggle, "uhm, ok, all done, see, that wasn't so bad?", she closed the transparent container so snugly placed around the toddler's sensitive parts, then closed the lid of the box, and spent a moment tightening all the belts and buckles to keep that little box all nice and tight.