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Boony had been pent up more than usual lately. The five-foot-eight wolf had been feeling the need to cum and jack off more than he usually did lately, and even then, his production had been astronomical. He had been making small ponds and streams around his house every day for the last week as he had been trying to relieve the pressure. But, after several days of just blasting out his cum everywhere and still not feeling any relief from doing so, he decided he might as well put his mini-Boony's to good use.

That was when he decided to head to the local sperm bank downtown. He could cum all he wanted, get some cash, and maybe even make some more kids. It was a quick walk to the sperm bank from the bus stop, but halfway there, he had been feeling the need to cum hard again, his balls getting pent up and filled with spunk. He tried to keep his legs crossed and clench his midsection to keep himself from just wacking it on the bus, and only just barely got off without flooding the vehicle. The walk was a bit better, but he could already feel his balls slosh and shake, straining with all the cum that was brewing in his seed factories.

When the wolf got there, his heart sank a bit. The waiting room was full of other men seated about, reading magazines or looking at their phones, and a hyena was just leaving the front test area after talking to one of the nurses running the desk.

Boony made his way to the nurse at the front as the hyena went to take a seat.

"Welcome to the Metro Sperm Bank, you here to donate or to look through our sperm banks?" He asked the wolf.

"Donate, please." He said.

"Okay, please understand that there is a two hour wait to see a nurse to accept donations, so you will have to wait a while, and if you leave, you forfeit your place in line."

"Ugh, really?" Boony asked, feeling another twinge in his balls, aching for release.

"Yes, unfortunately we're under-staffed today and we have a lot of other men wishing to donate. We're working as fast as we can, but there's still a line."

"Well, if that's what I have to do..." Boony said.

"Very good, please fill out these forms to the best of your ability, and when you're done, leave them here at the front." The nurse said, handing Boony a clipboard and a pen.

Boony took the list and headed into the waiting room, looking over the notes and taking a seat between a bored looking lion skimming a men's health magazine and an alligator mindlessly skimming his phone. He spread his legs to give his nuts some room to sprawl out and began filling out the forms, talking to himself as he filled it out.

"Name, Boony." He said to himself, "Species. Wolf. Address, blah blah blah..."

"Mind keeping it down a bit." The lion said, giving Boony a glance.

"Sorry." Boony said, still talking aloud but dropping the tone.

"Any notes or information a potential parent may need if given your sperm?" Boony said, then thought for a moment about his own kids and how he was, how it may be all genetic, rather then learned.

"Balls will be prone to massive expansion at the slightest provocation, as well as any offspring will be a possible cock vore predator." He said, "Be advised that the expansion will wind up reaching sizes bigger than the rest of their body by the time their body reaches puberty."

As he was filling out more of the forms, the alligator seated next to him was having his ears perk up as Boony was talking to himself, and especially seemed interested in the ball expansion part. Which, as Boony was seated there, with his nuts swelling from how they were being pent up, the crotch of his pants was expanding out, two round orbs pushing outward, filling out more space in front of his legs and filling out the gap under his tights.

"Man, you weren't kidding." The alligator said, gazing at Boony's growing balls in his pants, the seam on them starting to rip and grey fur the same color as the rest of his body was pushing free as his nuts continued to swell.

"Yeah, last time I tried to do a no-nut November, I wound up cumming for several hours straight when it was over, my nuts got caught between trees, and they ended up about sixteen feet around and over eight feet tall." Boony said, not looking at him, huffing some as his balls spread out more and the tip of his pink cock was pushing free.

"So these get bigger?" The gator said, leaning over to Boony's groin to take a closer look at those expanding balls and large cock pushing out.

A loud rip rang out and a heavy thud filled out the waiting room as Boony's balls finally burst through his pants, and a thick foot-long cock was flopped over it, semi-hard but throbbing larger as Boony put the clipboard down, focused more on his growing junk.

"Yeah, this is about how big they get after I've been sleeping a full eight hours, normally they don't get this big unless I haven't fapped for a few hours, but I've been so pent up lately that they're getting bigger, faster." Boony huffed, "Don't get too close though, or else..."

The warning came too late, as Boony's cockslit yawned open and a throb of his penis lurched his dick forward, sucking over the alligator's muzzle and quickly started to pull him into his body

"Or else my cock will eat you." Boony finished the sentence, his dick straining, stretching, and pulling, the alligator getting sucked down easily into the rippling cum tunnel, getting swallowed up with practiced ease before being dropped down entirely into his balls.

The gator barely had time to gasp as he splashed into the massive lake of cum inside Boony's balls, the wolf moaning out some, but his body quickly melted down into more Boony cum, only adding more to the pressure of how pent up he was, and those big grey balls wobbled and grew even more with his mass added to his supply.

"Fuck, getting really pent now." He said, with the alligator made him even more pressurized in his sac.

He spread his legs out further, his balls growing out now that he gave them more space, and his dick surpassed eighteen inches, still throbbing hard, growing up past his own chest now, hitting three feet long and his slit gaping open wide for more.

"Screw it, I can't wait two hours, and as long as I'm donating, I'm going to make it worth it." Boony thought to himself.

He looked to the rest of the waiting room. The nurse at reception had left into the back and no one else had seen him eat the other guy. That lion that was seated next to him was next. Boony brought his cock to his muzzle and then it stretched over his entire upper body, sucking him down into his dick and sending him to his balls as well. He didn't even last five seconds inside his balls before his body broke down into more thick creamy goodness. Boony's pent up state got even more intense after that, and he gruffed out a bit more, getting to his feet and dragged his balls behind him as he went to clear out more of the waiting room.

Next to go down his dick was a giraffe and a fox, both getting slurped up with ease and going into his cum tanks. After that, he grabbed a brown and white feathered gryphon, stuffing them into his penis to be sent to a gurgly fate. He did think that all of them were here to donate sperm, and they would, they'd just be his sperm instead of their own that would be donated.

One by one, Boony went to the other men in the waiting room. An elephant, another wolf, a dragon, a naga snake. All slurped up into his throbbing member and being dropped into his balls. All of them melting into more of himself. And still, no one noticed as he was sucking all the others down. A white rabbit, a black-fleeced ram, sucked down his dick, melted into cum. All the while, Boony was feeling more and more pressure building up in his balls as they grew out, reaching his lower back in size as he had to drag the twin sphere's behind him to the other side of the waiting room.

The hyena that was in front of him was next to go, and Boony stuffed his head down his dick as well, turning him into more thick spunk. A tiger was next. Then an owl and a big bellied bear. He had stuffed over twenty men into his cock, all of them turning into hot cum in a matter of seconds in his balls, growing then more and more as they filled him up. His nuts were as big as he was now, just as tall and far wider, and he still had a few more to suck away.

A rhino guy was swallowed, followed by a big doberman man. A thick lizard went next, their writing tail getting slurped into his cock like a noodle, and then a goat went down hooves first. Following him down was a warthog and another canine, followed by a purple-furred wolf. More and more they went down his dick, and more and more Boony's balls grew, getting harder to drag along the ground until he got to the last man in the waiting room. A red-furred squirrel was shoved down his penis, and now he had finished off the room. All of them melted quickly, and Boony was practically stuck on his balls, seated on them and laying back on the twin spheres full of cum, feeling all the churning and gurgling going on inside of them. The bulges all evened out rapidly and he was resting on two large spheres, cum and pre leaking out of his dick as he was incredibly pent up now, needing a big release. It was actually aching to keep it all in as he waited for a nurse to come back.

"Okay, Mr. Hayes, we have an available room now for....." One of the nurses entered before looking up to see that the waiting room was empty except for Boony on his balls, looking strained and pent up with his dick throbbing harder and harder, he had never seen anyone this hyper and leaking all over the waiting room.

"It's just me here now." Boony said through clenched teeth, his face covered in a blush at being caught in such a compromising position. "I've been extremely pent up, so I hope you have a lot of cups."

A very loud gurgle erupted from his balls, his massive grey sac throbbing and wobbling with him still on it.

"Or maybe some tubs?" Boony said, huffing as his dick kept pulsing and throbbing, oozing out cum and pre. "Like I said, I'm very pent up."

The nurse gawked a bit more at Boony's massive balls before pushing a button and going to the intercom.

"This is Andrew, I'm going to need some help with our next appointment. Can I have a few lab techs help me get him to a room?" He said, calling in for backup to deal with the big balled wolf.

A few minutes later, a pair of lab techs in green scrubs, a coyote and a gecko, came out to the front, and like the nurse, gawked at the massive wolf whose balls were filling out the waiting room. The nurse at the front hung back to watch and keep the hallways cleared behind him, though Boony and his huge balls did keep getting caught on mobile shelves and the occasional piece of equipment and had to have his nuts squeezed to push his way past to the awaiting waiting room, although that didn't do much to help him being pent up, the incredible pressure in his balls demanding more release.

When they did finally get to the room that had been set for the guy he cockvored, there was an orca nurse in blue waiting for him. He too gasped at the massive set of balls attached to the smaller wolf, and quickly started pulling out several plastic tub containers from their storage area.

"Okay, this looks to be going fast, let's get that cum out before you burst." He said, "You two, get his dick and get him off."

The coyotoe and gecko techs nodded together and each grabbed at Boony's dick from the side and began to jack him off, stroking that three foot slab of meat with both hands, going from the base to his head as the orca got more tubs.

"Wait, don't jack me off. I'll do it myself, one wrong move and..." Boony started, but then came another loud and lewd schlooorp from his cock, as the coyote had gotten his hand too close to his cockhead and his dick sucked his arm into his dick before giving another hard suck, pulling him off the ground and swallowing him down like a noodle.

The gecko and the orca nurse tried to grab at the coyote's feet, but Boony's cock just spread and sucked harder, sucking them into his cock next as well. In under a minute the two vanished beyond his slit, and now the bulge of the trio slipped into his base and dropped them all into his balls. A loud sploosh echoed in his sac and the three melted down into more Boony cum in less than thirty seconds, making Boony's dick throb and ache even more as his balls demanded release.

"Fuck fuck fuck!" Boony said, "Anyone, get more tubs for this room, get as many as you can, it's going to be big!"

His throbbing, pulsing cock couldn't hold back any more, and his dick started gushing out, splattering thick ropes and a heavy torrent of cum into the tub that was in front of him. Gallons of pure wolf spunk splattered into it soaking and filling up the plastic tub with wild sprays shooting and splashing up and hitting the ground. In a matter of seconds, Boony filled it up and a torrent of cum began flooding out before Boony aimed his dick as best he could to a different open tub.

His orgasm continued, splattering out his pent up load of cum into the next tub, filling it out with white goo, rapidly filling it with his constant, steady pumps of his penis, barely making a dent in how backed up he was and how many men were part of his donation. That tub barely lasted longer than the first one before it too was filled up and Boony started working on another.

Behind him, his balls were mostly blocking the door, but it had enough space that a smaller nurse or tech could squeeze past his sac, making the pressure on his nuts increase even more, and get some more tubs in. They were also quick to try and move the filled up ones out of the way and to get out of the room as fast as they could once they did, least Boony's cock suck them in too and make them more of his flooding donation.

He soon had the third tub filled up with cum, and then the fourth tub. Multi-gallon tub after multi-gallon tub were filled up with cum, thick ropes and sticky goo spraying all over as they did what they could to collect all of it. For several minutes Boony emptied his balls, his natural production making it difficult to make a dent in what he was spurting out, but he was gradually shrinking his balls down as he filled more tubs with sperm. The room he was in was going to be a wash, however, as even the leftovers of what he couldn't gather in the tub were going all over, painting over cabinets, drawers, and equipment in pure wolf spunk.

Over a half-hour passed, then an hour, a steady train of tubs coming and being taken out as Boony could touch the ground with his feet again, his balls getting to a massive but still manageable level, as more tubs were filled with his cum. At the two hour mark, his nuts were the size of watermelons as he kept jacking and pumping his cum into the tubs. He had over a hundred filled and even more spunk splattered all around the room. His nuts, hanging down to his knees, gradually deflated more as he kept jacking, until finally he squeezed the last bit of his orgasm out into a tub and fell backwards, landing on his butt as he panted loudly.

The room was covered in cum, Boony's spunk dripping from the walls and ceiling, making it a creamy mess of what couldn't be collected. Over a hundred large plastic tubs of cum were collected, and almost everyone in the sperm bank was dripping with his seed, as his orgasm had turned into an all-hands-on-deck situation of collection. He slowly got back to his feet, his dick going soft and flopping against his leg, an impressively-sized member even when soft.

"Whew, I needed that." Boony said, huffing some, but then heading out of the office and back to the waiting room to sign out.

A steady river of cum was flowing down the hallway and out the front door as Boony signed out, and as he did, he also checked the box saying he didn't mind being contacted if a prospective couple had their offspring want to know who supplied the seed that made them. After signing his name, he headed out the door and back to the bus stop, his junk swinging with every step.