Suddenly a splash hit the boys. Looking down at herself, Zach saw her pink fur was covered in muddy water.
"The fuck" came Jeremey's deep voice.
Broken from their sexual reverie, the trio turned at saw an odd sight. Two women, both probably in their late-twenties giggled a short ways over, holding a bucket of muddy water.
"Get a room!" one of them shouted. Zach wasn't sure what she meant but knew she was teasing them.
What was odd, however, wasn't the weirdly childish prank of the two women but the fact that before their eyes, the ladies were changing. Slowly their height began to decrease as their ears stretched skyward into donkey like points. Their long flowing hair slowly receded, forming into short, messy boyish haircuts. Meanwhile their ample chests receded, shrinking into the flat, muscle less chest of young boys. As their bras fizzled into none-existence and bottoms stretched into baggy swim shorts, fur raced across their bodies.
"I hawww feel funny, Charlie" one of them said as 'she' traced a hoof capped hand over her furred, flat chest "Where'd my boobs go?"
"Dude, Sam" Charlie replied, her face stretching out into a muzzle. "I don't know but I'm starting to feel super good for some reason."
A grin crossed Charlie's face, and eyelids droops. Her hand made its way down to her crotch which she began to gradually knead. The boys noticed a small bulge forming where her hands stroked. By now both girls looked to be around 14 in age, their features loosing not only height but the subtle lines and changes that come with maturity.
"Bro what are you doing?" the Sam asked, her voice having dropped to that of a teen boy's, and her vocabulary seemingly changing with it. As her friend stroked her crotch, it gradually inflated a thick equine cock pushing up beyond the rim of her suit. As the tip bobbed needfully in the air, she lightly caressed the tip. She shuddered as she felt the foreign tingles of masculine pleasure.
"Can't help it dude. I think I'm a teenager now. These hormones. Fuck, dude. I feel so fucking horny" Charlie gripped his cock, slowly stroking it.
As a tail extended out of Sam's spine, her eyes also fell half lidded and a dopy grin crossed her face. "Bro, I think our name's fit us better now that we're dudes. heh. Fuck! I just realized, now that we're boys we totally need to find some hot chicks." He said, giving his own crotch a grope.
"Fuck yea!" The Charlie replied, giving his friend a playful punch in the arm "I think I know a strip bar not far from here!"
"Dude I'm so down" Sam said, his hand stroking his cock in anticipation "Let's get the fuck out of here"
On that note, the two teenage donkey boys dashed off, each sporting massive erections ready to try out their new forms.