#our mistake

The roadtrip up begins normally, with them arguing over who gets the aux cord and making fun of each other's music tastes. But a few hours into the trip he starts to feel....odd. A sort of twitchy, tingling feeling in his balls. He ignores it, hoping it'll go away, but it only increases. In fact, they feel a little swollen, still pressing against his thighs slightly even with his legs spread. This isn't an allergic reaction or something to those pills, right?

And worse yet, that twitching feeling is making him hard.

He holds his bag over his lap for the rest of the trip to hide the bulge, though the twitching has turned to a squirming, a churning in his balls has him clenching his jaw and trying his best not to pant as his cock throbs beneath his jeans, but all he can think of is getting off.

He manages to play his sudden quietness off as motion sickness, and when they get there he practically hurls himself from the car, gasping at the feeling of his balls sloshing with the movement. What is happening to him?

He stumbles a few steps, his cock painfully hard and sensitive against his leg--he's not going to make it to the bathroom like he'd planned. He looks around frantically, eyes settling on the lake.

He rushes towards the nearby dock as much as his sloshing balls and throbbing cock will allow, throwing himself into the water and the relative privacy of the water.

He desperately claws at his button and zipper, the denim stiff and unwieldy in the water but he manages to get them down around his ankles, yanking his underwear down and falling to his knees on the silty lake bottom and grips his cock, desperately stroking himself.

Disappointingly, his cock seems to be its usual, average size-- but his balls. He can't quite see through the silt he's stirred up, but when they bump his thighs amid his stroking they feel the size of baseballs.

It doesn't take long before an orgasm grips him, blessedly releasing the tension that had accumulated over the trip and he's nearly sobbing with relief--at least for a moment, until he registers the squirming in his balls is increasing, increasing--until the usual feeling of release is accompanied by a bizarre tightness in his urethra that rolls down his cock until--

He groans as what seems to be a sperm the size of a tadpole squirms its way out of him, squiggling away into the water. Before he has time to fully process this, there's another, then another and he's gasping and moaning and trying not to fall over in the water as he births a veritable swarm of cloudy-white sperm into the water around him with heads the size of a fingertip.

The orgasm stretches on and on, drawn out by the sperm's slow passage out of him, distracting him so he doesn't notice his friends nearing until its too late.

One cannonballs into the deeper water near him in nothing but his boxers, and another two simply throws themselves off the dock, laughing at him as he flinches away from the splash as they're followed by a few more reasonable friends that wade in from the shore.

"Dude, you went right for the lake? Hell yeah," one friend laughs as they swim closer.

He tries to respond but another sperm squirms its way out of him, making him gasp and nearly fall over.

"You okay?" another friend asks, laughing. "That car really fucked you up, huh?"

He tries again to respond, but is saved from doing so when the third friend shrieks, jumping back.

"Something touched my leg!"

"Oh my God, bro, are you serious? Are you scared of fucking perch? We're in a lake, not the fucking ocean."

"It didn't feel like a fish, it--"

Another friend yelps, but this time it's accompanied by a series of frantic cursing and grabbing at his boxers. "Something just--! Something fucking---!"

Another sperm spurts out of him. Another. Another.

"Did something bite you?"

"No it--it--"

"AHH FUCK"

All around him his friends begin to panic as the sperm find them, zeroing in on their body heat and quickly finding holes to squirm into, their pheromone trails leading other sperm to the same places.

And he hasn't stopped cumming yet.

He watches his nearest friend flounder helplessly in the water as a swarm of squiggling white sperm surround him, pushing and shoving each other out of the way as they squirm their way inside of him, his belly quickly swelling out under his hands. Another friend tries desperately to swim away to little avail as the sperm take his face's close proximity to the water as an opportunity to pour into his mouth too.

The sight of it, of his own seed so aggressively and easily subduing his friends is making him........hard?

A third friend desperately bats the sperm away in the water around them, and somehow in the chaos they notice he's still on his knees in the water, seemingly unaffected.

"Help--Help me--" they wade towards him, stumbling and gasping as a particularly aggressive sperm wriggles its way inside of them.

When they regain their footing and stand, rising out of the water, he sees their belly is swollen to the size of basketball, as if they were pregnant when moments before they hadn't been. Not only this, but a few sperm have found their way to their chest, a few more wriggling up their wet torso and pressing themselves into swollen nipples, chest plumping and squirming with each new entry.

"H-help, go get--h..." they pant, cradling their belly as they come close enough to sink to their knees in front of them, catching themselves on his shoulder. "Go..get...h....."

They look down. Down into the water between them where his hard cock is still in his hand and his balls are now easily the size of grapefruits, churning. Squirming.

The friend looks up at him, their eyes wide with understanding and panic as their swollen belly writhes in their hands.

"Dude---dude, don't--"