"Nice cock, bro!" the nerdy voice of your skinny friend James confirms as he pushes up his glasses and locks the bathroom door behind him. "Don't worry, it'll be back to normal tomorrow. Until then, it's a cum dispenser with crazy fast refill."
"You jerk," you mutter in the faux-annoyed way you two react to pranks without long-term harm, cumming in his direction and forcing him to step aside to avoid the squirts. "Certainly shoots like one. Did you try this out yourself?"
"Course I did." James says with a smirk, pulling down his pants to reveal a similar cum-inflated condom pairing a miniscule manhood with average balls, a little shorter than yours but slightly thicker. "Handy little one-use temporary buzzer-button condoms, the lube's an aphrodisiac."
"I'm aware." you say, watching him trash the used and now powerless condom and taking the excuse to step closer. "Wanna make a mess with these peashooters? Like a watergun fight, but with more spunk."
"Oh, you're on." James says with a chuckle, shucking his clothes into a pile on the side as you do the same. Stepping clear, the two of you fap like madmen and proceed to bukakke-tag each other while making stupid puns. Loads fly in bursts of pleasure, penises spasming with hands like silly spray cans, and when push comes to shove both of you are pretty slammed with the sticky stuff. Courtesy of a lot of misses and wide shots along the way, you make a pretty alarming mess of the bathroom in general that'd make some artists question your devotion to white paint and getting off, outside the stalls at that.
Some aggressive use of wet paper towels later and 'accidentally' creaming James' shorts in the crotch for the last laugh, the two of you stumble out of the bathroom, arms on each others' shoulders and smelling like a locker room orgy.
"You got any more of these things?" you ask. "Would be fun to try out some new junk."
"I can do way more than genitals." James brags. "Full body transformations, temporary history alterations, real exotic stuff. My production kits are back home, but I gave you a whole pack of gag gift ones to see what you'd do."
Slapping his ass and causing the bastard to cum in his pants himself, you grin. "The night's young, we're horny as all get out, and we've got plenty of hours left on quick-shot rapid pumps here. You wanna mess around, James?"
The two of you sheepishly lower your trousers and less-sheepishly proceed to grief the park with your seemingly limitless stamina. Somehow James had brought a vibrator along, and outdoes you in terms of hands-free spraying. White stains aside, you've got some time to kill before your dicks get back to size, so...