Brian and his buddies Mark and Cory were really jazzed to be spending the day at the Water Park; Mark's older brother worked there, and had gotten them in for free. They'd already had tons of fun ogling all the hot girls in their swimsuits, and Mark and Cory had already gotten girl's phone numbers; they were hot high school seniors and on the prowl. They all worked out regularly, their muscles were gleaming in the sun. Brian was built like the other two, but he was a little shorter and stockier.
They had special plastic bags to keep their cellphones waterproof, a great invention, so they could still take selfies for their instagrams and whatnot (and get the digits of cute chicks). They had climbed almost to the top of the brand-new tubing waterslide the park had premiered that year. They each carried a see-through inner tube to sit on when they'd go down the slide. It was a new addition to the park that year, the longest slide they'd ever had, and made of completely transparent plastic, so you could see people as they went down and circled around and around the park; it passed by every other close attraction.
Brian had just turned 18 the week before, catching up to his friends, and he'd been kind of a pain in the ass most of the day, ribbing Mark for getting an "ugly" girl's number, and Cory for liking a "fat" chick. He'd also been jokingly yanking at the other guys' swimsuits to make them think he was gonna yank them down. So when Brian was messing around with his tube, putting it over his head and squishing it down over his shoulders, Mark saw his chance, and pushed it down his body further, trapping Brian's arms against his sides.
"Hey, whoa guys, this ain't funny," Brian said, shaking around, trying to get the tube off, flailing his lower arms ineffectually.
Cory laughed, "Oh man, you look like a stupid little T-rex, with your faggy little arms."
"Shut up, man, I'm not a fag, you're a fag!" Brian shouted.
Mark grinned, "I wouldn't call your buddies names if I was trapped like that".
"Fuck you, whatcha gonna do to me here?", Brian foolishly asked.
Cory and Mark looked at each other and grinned. Mark took out his cellphone to record and take photos as Cory walked around down the stairs below Brian and, after a couple of joke yanks, pantsed Brian's bathing suit to his knees, leaving him fully exposed. Everyone around them on the stairs was laughing and hooting with delight at the hilarious sight. With his arms trapped, Brian couldn't cover himself, but tried his best to hide his penis from view.
He had a good reason for that. Mark gave a low whistle, "Whoo hoo boy. Brian, you've got a tiny little dick, don'tcha?
"I do not! Shut up!"
"Cory, spin Brian around", Mark said.
Cory turned Brian to face the other folks on line on the stairs; before they'd only seen his perky ass, but now they were treated to a view of his little dick, bouncing around as he shook in fury and humiliation. Everyone waiting on the line saw everything he had!
Mark called out, "What do you think, guys? Does Brian Arthur McManus here have a little dick?"
The crowd was convulsed with laughter and shock, but those who were able to respond agreed that it was small.
A woman shouted, "My son has a cock bigger than that, and he's four years old!"
One of a pair of gay guys shouted, "Shame about the tiny dick, stud, but that ass is spectacular!"
"Pathetic!" shouted a high school senior who Brian recognized from the neighboring school- their rivals in football.
More cameras came out to video Brian's fully bare mortification.
Brian choked back tears as Cory whispered in his ear, "This is what you deserve for being an ass all day. We'll let you pull up your shorts soon, if you're good. But for now, try to be a man."
Mark addressed the crowd, "Brian Arthur McManus has been a jerk all day, so even though he just turned 18, he's going to get a spanking right here and now on his bare butt. Who wants to see that?!"
The crowd roared with excitement, as Brian shouted, "what!?"
The line had moved on a bit, so Mark dragged Brian up some more stairs, then bent him over facing the crowd, so they could see his face and dicklet bounce. He gave six hard slaps to Brian's ass, making him shout.
"Please stop! Please!" Brian shouted, as the assembled waterpark crowd enjoyed their unexpected show.
"Be a man, don't act like a little bitch," Mark scolded him, "I'm going to give you twenty more. Count them out loud and say thank you, and if you don't cry, I'll let you pull your bathing suit back up. You understand me?"
"Yes, sir." Brian said. Wait, why did he call Mark 'Sir'? He'd never done that before. It was like Mark was his dad, owed that respect. His mind whirled as all of a sudden Mark's hand came down on his ass with a harder SMACK than before, then another.
"Ohhhh noooo," Brian moaned.
Cory slapped his face, saying, "You're not supposed to moan like a girly-girl, you're supposed to count them off, Brian".
"I'm sorry, I'm sorry, sir: One!" Brian pleaded, his face and ass stinging.
"Nope, you did it wrong," Mark smiled, giving him five quick slaps to his ass, making Brian's little package bounce as he squirmed in his mortification, "Start over with one."
"Yes sir, I'm sorry."
Brian's cheeks burned like fire as more and more people noticed what was happening and came to witness his wretched humbling. He was perfectly on display, as if it were an elevated stage. He saw some water park employees down on the ground, but there was no way they could get to him to rescue him up on the stairs, with the crush of people blocking them. He noticed the guys taking out their phones, he assumed to call security, but then he realized they were also merely videotaping his torment.
The spanking began in earnest. He counted out the first five, loudly.
"Now," Mark said, "for the next five, I want you to count and say, 'thank you, sir', after each spanking, you got it?"
"Yes, sir."
"And don't cry, remember, or your suit isn't coming back up," Cory added wickedly.
"Yes, sir."
Five more burning spanks to his ass, and Brian shouting out to the amused crowd, "five, thank you sir!" He was in agony, his legs shaking from the assault on his rear end. "Six, thank you sir!" He saw a girl stepping out toward them from the crowd. "Seven, thank you, sir!" He realized it was Lisa, his older brother's girlfriend. "Eight, thank you, sir!" His jaw dropped as he saw her take out a professional-looking film camera; of course, she was studying moviemaking in college. "Nine, thank you, sir!" She trained the camera on him. "Ten, thank you, sir!" He'd never felt more exposed and helpless than at that moment.