Gif: IRRESISTIBLE (Patreon)

Morris and Larry found an old washing machine in the junkyard and took it back to their skuzzy apartment, hoping it would work. But when they plugged it in they were amazed to hear it speaking in a deep, intimidating voice that echoed off the cracked tile of their bathroom walls.

"I am a genie," it said, "trapped forever inside this machine. Whoever owns me shall be granted three wishes."

The boys looked at each other incredulously. It seemed impossible, but they were broke and desperate and they had nothing to lose by playing along.

"Hang on," Morris said. "We both found you, so I guess we both own you. Does that mean we each get three wishes?"

"No," the machine said. "It must be three wishes between you. Wish wisely, for once a wish is made it cannot be taken back."

The boys had a good think between them and agreed that they would make one wish together and then they'd each get a single wish of their own. Larry spoke their first, shared wish.

"We wanna be rich," he said, "with a big, fancy house instead of this dump."

In an instant the bathroom expanded around them and took on a whole new sparkle. Their clothes transformed too, becoming white silk pajamas, and their shoes became the kind of designer sneakers that probably cost more than either man had made in the last year. Larry opened the bathroom door, glanced down the hall and hooted with delight.

"Holy shit," he said. "This place is amazing! OK, for my wish I want to be a super hot guy, one who's totally irresistible to girls."

The washing machine's door flew open, there was a whoosh, and Larry's sneakers were sent flying into a corner of the bathroom as his robe was sucked right off his body and into the machine. In an instant Larry had become a tall, muscular man, his startlingly long, thick cock swinging between his thighs. Morris made a face and looked away.

"Gross, dude," he said. "Come on, I don't wanna look at that thing!"

Larry got a towel and wrapped it around his waist to cover himself, then he picked up his sneakers so they wouldn't get dirty.

"Jeez," Morris said, "check out the size of those shoes. When you got taller, your feet got bigger."

"My everything got bigger. Come on, make your wish now."

Morris smirked.

"Well, I'm not gonna let you get all the babes! I wish to be even hotter, and even more irresistible!"

The washing machine opened its door again, there was another rush of wind and Morris could feel himself transforming... but instead of getting taller, he was getting smaller. His hair became long and blond, and when his clothes were stripped from his body he was shocked to discover that he was now a busty woman wearing a black bra and panties. An instant later his lacy underthings were gone too, leaving him nude and jiggling. He gawked at the mirror, and the most gorgeous woman he'd ever seen gawked back at him.

Morris rushed over to the washing machine and threw open the door to get his clothes back, but it was empty now.

"Hey," he yelled down at the machine, "this isn't what I meant! Come on, change me back!"

But the machine vanished without another word, leaving Morris staring at the empty place where it had been. He turned to face Larry, and as soon as they locked eyes they both felt a wonderful, terrible tingle pass between them. A hunger, growing stronger by the moment.

As a totally irresistible man, and a totally irresistible woman, Morris and Larry couldn't resist each other...

I'm not saying this is the best thing I ever wrote, but given the very weird parameters of the gif ("Write a story where a girl gets stripped by a washing machine, while she's watched by a buff guy in a towel who is holding a pair of sneakers in his hands!") I'd say it turned out pretty well!