Gotta Go! (Watersports, cock growth)

Story by Riu1122 on SoFurry

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Idk this is an idea I've had forever. What if a guy's dick grew as he pissed?

Plot premise blatantly stolen from Ziel's The Biggest Dick, but hey, call it an homage.

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And patreon! https://www.patreon.com/Riu


"Outta my way, hag!"

The elderly tortoise was shoved rudely aside as the 7'1" wolf barged past. She stumbled, nearly falling flat on her shell. The wolf did not pause or look back and within moments had disappeared into the crowd of the noisy mall.

She huffed. Well, she was nothing if not a petty witch. She mumbled a curse under her breath, subtly gesticulating ancient hand signs. The little prick deserved it, she figured.

Mark hurried away, the sluggish turtle he had shoved to the side long since forgotten. He had nowhere to be, but he did have a blunt waiting for him at home for a nice after-work smoke. But as he rushed down the busy afternoon city streets, he began to have the insistent urge to pee.

He ignored it at first. He was at 8th and Cannes, and his apartment was at 20th and Goodwill. That wasn't too far. A 20 minute walk, maybe; less, if he were to rush. Which he was already. The best way, he decided would be to head due north through the huge park in the city central, Capstone Park, then turn and walk west to his apartment.

A sound plan. He avoided thinking about the pressure in his bladder as he continued walking down Cannes, now past 11th street. He could see the gates to the park only a few blocks ahead. Capstone took up blocks from 13th street all the way up to 20th, and was densely populated with trees and bushes.

Mark was astounded by the quickness with which he felt the need to drain the main vein, so to speak. Only minutes ago he had felt fine, and it wasn't like he had chugged a few gallons of water between then and now or anything!

But as he turned his head both ways and crossed 13th street, there was no denying that he had to piss like a racehorse. In fact, the only time he could remember having to pee worse was when he was a cub on a long car trip with an impatient father who hated frequent stops.

He passed through the open gates to the park. It was relatively quiet, within view only a few lone wanderers and 2 romantic couples strolling through the greenery. Mark powerwalked past all the other furs, clenching his pelvic muscles tightly.

Where was he? Probably at about 14th street? Maybe 15th? So at least 5 more blocks north, then 5 blocks west. Oh gosh, that was too far.

He veered left, and took an offshoot of the main north-south path, one that ran more northwest. It was deserted save himself. That was nice, it allowed him to break into an awkward run, clutching his crotch with one hand.

It felt like his bladder was gonna explode. Mark was now highly doubting his ability to make it to his own toilet, or any toilet, before he pissed himself. A warm wet sensation on his leg tipped him off he was correct. He cut the flow off immediately, but there was no doubting he had allowed a spoonful of piss to escape.

His underwear was damp around his cockhead now, and the whole garment clung a little tighter to his pissy flesh. He looked around, panicked. Ok, time to just take a piss in the woods. That's really no big deal, after all, it's the way nature intended.

He rushed off into the bushes, already unbuttoning his shorts. Once he was suitably ensconced from any passerby, he pulled down his shorts and undergarments and let his junk flop out. Instantly, a jet of piss burst out of the end of his cockhead, half without his permission. He gave a hearty sigh as his fat 7" soft canine cock let his bladder's load fly.

The hot, amber yellow fluid hit the ground with enough force to send a small spray of dirt and piss up where it hit, and as a small, muddy puddle of his pee formed, the stream caused an almost-fountain like effect.

Something felt strange though, and it took Mark less than a second to figure out what it was. As he pissed, his cock was growing bigger.

At first he was sure he was hallucinating, but as the puddle on the ground formed, he realized he had to be right. Every drop of piss that passed through his urethra was making his junk a little bit bigger. In only the 2 seconds he had been letting his stream loose, his cock had gone from an impressive 7" soft to a huge 9" soft.

And it only seemed to be growing faster. The puddle on the ground spread out, turning the first couple of feet in front of mark into a muddy, ammonia-scented mess. His cock was now easily a foot long, balls swinging in a tennis ball sized sack below.

He clenched desperately, sealing off his urethra, and the hose-like spray halted abruptly. His cock stopped its seemingly-relentless expansion, leaving it at 13" long, still totally soft. The growth had not left it asymmetric either; it was still equally, deliciously thick as when it was 7", and his balls had grown to nearly-tennis ball sized.

And he still had to pee. Badly. He stuffed his oversized genitals back into his pants, and waddled away as quickly as he could without wetting himself. He had to get home.

Traversing the park was surprisingly easy. Using an awkward jog, Mark exploited every shortcut he knew to deposit him at the exit nearest his apartment. The pressure in his bladder was horrible, but at least however much he had deposited in the woods had alleviated the pressure somewhat.

He was back on the streets at 19th and Lava. Powerwalking once more, he crossed Lava, following 19th to Goodwill, and then only one block north to his apartment.

And thank God, too, his bladder was about to explode again. He rushed around the corner, pushing past some dumb fuck who got in the way. He was about to lose it. He broke into a run, less than a block away.

That's when the floodgates broke. He began to wet himself with a vengeance. At first nothing was visible, but it only took a moment before a huge and spreading wet stain made itself visible through the crotch of his pants.

The growth resumed too; every milliliter of piss causing his cock to expand that much more in its tight cloth prison. He grabbed his crotch, the pressure incredibly painful, both from his bladder and from his expanding dong in his underwear.

Mark had something like 16 inches of cock and pounds of balls stuffed into an overworked and now soaked pair of shorts. The wet stain had spread down the leg of the shorts as the bubble-like bulge in the groin grew, and now a steady waterfall of piss ran down Mark's right leg, matting down the black fur and releasing a pungent, acidic aroma into the air.

Passersby had begun to notice. How could they not; the impressively tall wolf had stopped dead in the middle of the sidewalk, clutching his crotch. And the scent and sight of the piss staining his shorts and now pooling at his footpaws. One tigress gasped and rushed away at the sight, another rooster actually let out a short squeak of a scream.

The strangest and most concerning part of the spectacle was the impossible bulge in the anthro's shorts. It looked like a prize-winning watermelon had been shoved into the tight pair of pants. With an audible POP and ripping noise, the button of the shorts gave up the ghost and was rent asunder by the pressure of the growing genitals. Without its support, the zipper had no chance, and simultaneously burst open.

The slight relieving of pressure was all his junk needed; still-wrapped in his stretched-out underwear, a good portion of his piss-spewing hose and his heavy, fat balls fell out. The two-foot dick sagged in the underwear between the wolf's thighs, a muffled fountain of urine forcing its way through the fabric to spray out by his right hip.

Mark was now standing in a puddle of piss several feet in diameter. He tried to stop the flow, but it was hopeless. The hot, golden liquid just kept coming and coming, gushing out in a blast that never seemed to get any weaker. Even the pressure in his belly wasn't lessening.

Finally the blasted-out fabric surrendered, and like the shorts before them, split, this time along the seam. His firehose of a cock never stopped spraying, sending an arcing shower of piss through the air as it flopped free entirely from its prison. The three-foot cock dangled in front of the wolf, piss still streaming out of it like a rocket, splashing magnificently into the huge puddle he had created.

Fellow pedestrians were aghast. The more indifferent of them simply took a wide berth around the lewd display and the expanding pool of pee, while others turned straight around to find another path. There were some, however, who had stopped and now gawked at what was happening before their very eyes. Some of these seemed simply frozen in shock, but others seemed to actually be enjoying the display.

His giga-cock and head-sized balls seemed to sense that they had more space than ever to expand. As soon as they flopped free, the rate of growth dramatically increased. The dangling cock went from 3 feet to 4 in only about 2 seconds, during which it spread a huge volume of piss all across the wide sidewalk. Mark's balls were not forgotten in the inexplicable swelling, each nut the size of a pumpkin and still growing.

He was a phenomenon that could not be ignored now. Someone was calling 911 on their phone, looking frantic. One or two furs were clearly aroused by the happenings; one fox was openly rubbing his groin, letting the expanding puddle slowly lap at his footpaws.

Mark's cock was not erect, yet seemed to suspend itself, fighting gravity somehow, so that even as the cock rivaled the average anthro for height and his own chest for girth, it did not drag on the ground. Instead, his titanic balls, now taking up all the room between his hips and the concrete, began to get in the way of his standing as his piss-rocket passed 6&½ feet long.

The fox was now up to his ankles in wolfpiss, and drooling. Pedestrian traffic had entirely stopped on this side of the street, save for the loiterers, almost all of whom now were those with some kind of perverse interest in the sight. Cars even now avoided the right lane, which was slowly being flooded with piss from the expanding 7 foot cock on the side of the road. Mark could hear a siren in the distance.

The growth rate picked up, especially in his balls. He widened his stance as much as he could, forcing his balls out in front of him as much as possible. But as their diameter exceeded the length of Mark's legs, there was no helping it. The weight of his 10 foot cock and balls tipped him forward, sending the 3 foot thick cock slamming to the ground, nearly striking the fox who now lay on his belly, lapping up the pungent piss as it flooded around him.

Mark's footpaws were lifted clear off the ground, resting his full body weight on his 12 foot and growing junk and person-sized balls. God, the pressure was still so intense in his bladder; it felt like he hadn't let a drop out yet, but the fire hydrant-like blast of piss rocketing out of the end of his massive cockhead and drenching the city streets said otherwise.

As the swelling junk passed 18 feet, now growing several feet per second, his balls were so wide they nearly eclipsed the sidewalk. People were now running away, the only exception the crazed fox, who had his dick out and was also pissing, a tiny addition to the massive lake now surrounding the wolf's genitalia.

And it wasn't gonna stop now; the flood of piss blasting out the end of his person-sized cumslit was only increasing as he grew ever faster. The pressure in his midsection didn't seem to be alleviated at all by the gallons upon gallons he'd released already. His cock was 22 feet long, now easily intersecting the street; his balls alone blocking all oncoming traffic.

"Ughhh! And I still gotta go!"