Let the back fall.

You weren't about to bare it all, especially not on this first challenge. But you couldn't ignore how close this race was. So, swallowing some dignity, you let the back of your trunks fall, keeping hands firmly at the front as you ran even harder. You hear a few of the women behind you let out cheers and catcalls, a wolf-whistle coming from Jenna's microphone.

"Alright, finally getting some boy-butt in the mix!" the host calls, "Mm, look at those flexin' cheeks! Run, Sam, run!" You're sure that even if you weren't sprinting, your face would be red, and seeing Maria up ahead of you, you worry a bit more about how well your blood is pumping; as you watch, Maria's undersized bikini bottom gives up the ghost, snapping at the sides. She quickly bends over to try and cover herself, giving you an unimpeded view of her expansive ass, scrambling to pick up her bottoms before shockingly not covering herself, but grabbing her bottoms in one hand and another part of the cord in another, running with them held up in front of her, as her butt bounces with each step.

"Woooooo! Wasn't sure we'd get full bottomless streaking this early in the show but thank you so much Maria for proving me wrong!"

"Hey!" Looking over, you see Sarah at her side; and true to her word, she's let the bottom of her backless one piece fall, baring the smooth, dark skin of bouncy behind. With a breathy chuckle, she shouts at you, "Look later, run now! Stay focused!" Stumbling a little, you take her advice, and redouble your efforts. Along with a couple from the other team, including the frisky cowgirl from before, Maria stands at the finish line, grinning bashfully with her bottoms held tight in front of her crotch. Alongside another of your opponents, you and Sarah cross the finish line at roughly the same time, to a cheer from Maria who for a second forgets her state, and moves her hand to high five you, though she quickly sputters and laughs when she realizes she flashed you all.

"Alright, that's 12 buns across the finish line!" Jenna shouts, "Maggie and Yasmine, get your butts in gear, cause one of them is going to decide this match!" Maggie is pretty obviously not enjoying herself, keeping herself covered despite it slowing her down; thankfully, you and Sarah mooning the camera seems to have bought her some time, at least compared to her opponent. Yasmin, her name was, was a slender woman, and her bottoms were having trouble staying up such svelte hips, as they kept sliding down, baring her in the back and giving all of you ahead of her a peek of dark hair between her legs. Maggie is leading, and even with Yasmin's sudden burst of speed at the end, Maggie still safely crosses the finish line ahead of her.

"Show-Offs win!" Jenna shouts, "Good job to those of you that dared to bare, and Conservatives, sorry that any of your nudity was for naught." You and your teammates share some celebratory cheers, though a few of you still have hands on your suits. "The winning team will get a little bonus for later this evening; once you all have those weights off, we'll be stopping by to show you where you'll be staying each night. Don't get too comfy though, cause we'll be having another challenge soon after. And, don't worry Maria, we'll have a replacement suit ready for you there."

Well, you mooned the entire viewing audience, but you weren't alone, you definitely weren't the worse off, and your team won!