The two girls made it to Mr. Kelly's office at the same time. He escorted them into the main foyer where two exercise machines that resembled the Nordic Trac were stationed.

"OK girls, pick your machines," Mr. Kelly said. The students who were passing through the foyer stopped to see what promised to be an interesting event.

"Excuse me Mr. Kelly," Shannon said.

"Each of you will ride these machines for a little while. Please pick the one you want. I thought I was pretty clear."

Shannon looked at Carrie and shrugged, but got up onto the machine on the right, closer to the main walkway. Carrie then mounted the one on the left, closer to the wall.

"Make sure your feet are in the stirrups and begin operating the machine. You will be on there for the first 20 minutes of the period."

The assembled students (and some teachers Shannon noticed) giggled at the order. There was nothing particularly taxing for the young girls, 20 minutes on the exercise machine was nothing. But being on this machine, holding the handles and exerting force left them completely open to anyone's view, unable to close. Of course, as they exercised, their breasts and asses would bounce and create an erotic sight. And the sight of sweaty nude young girls in the halls would raise most of the boys' blood pressures (among other things).

The girls started moving the machines, pulling their arms in the opposite direction of their feet. It was long before sweat started to form on their nude bodies as they exerted energy. Shannon was definitely in better shape than her friend, who started to feel the burn in her thighs and shoulders, The gathered crowd watched Carrie's amble breasts sway from the exertion but also from the heavy breathing. Shannon's little breasts did not jiggle the way Carrie's did, but her taut, firm body was still a sight to behold.

Finally, Mr. Kelly told the crowd to move onto their next class. Shannon and Carrie had hoped their workout was done but he set the timer and showed them the video camera and told them not to stop until the timer went off and he came back to get them down. Any stoppage before the alarm going off would signal another punishment.

The girls groaned at the knowledge that their punishment was not yet over but continued moving on the exercise machine. Carrie closed her eyes in exhaustion, trying to forget the heaviness in her chest and the pain in her legs and shoulders. Shannon wanted to close her eyes but something caught them. It was Mr. Jones, standing off in the shadows, watching their every move. She thought he was almost nude but remembered he was wearing a tan suit that day. His hand seemed to be moving quickly but when he saw her looking at him, he vanished into a door and was gone.

Finally the alarm sounded and Mr. Kelly came out of his office. "Okay, girls, part one is over. You may get off the machines."

The girls stopped moving their arms and feet and brought the machines to a complete stop. Carrie's body felt like it was on fire every time she moved and was a bit woozy as her bare feet came out of the holders and onto the floor. Shannon was a bit better off but she was still a bit unsteady after 20 minutes of full movement.

"Ladies, over here for part two."

The girls both moaned at hearing his instruction. They had hoped that part two wasn't going to happen. They moved tentatively towards the disciplinarian who was holding a long silver cylinder.

"OK, stand here, back to back, about a few inches apart.good girls," he said. "Now, each of you bend over and grab your ankles."

The girls looked at him questioningly. This seemed weird, even for the recent events. This would put them in a very vulnerable position in the middle of very well-trafficked place.

"Come on ladies, please do not make me ask you again," the disciplinarian said sternly.

Shannon moved first, grabbing her ankles, causing her ass to stick out and become very prominent. From her vantage point, she saw several male students standing behind her, pointing at her asshole, now on display, and slit which was very prominent. She then saw Carrie's head and their eyes locked as Carrie assumed the position, her eyes wide open and scared. Shannon smiled and mouthed the words, "relax."

"Girls, I am going to put my hands on your upper backs to put you into position. Please do not be alarmed, I am a gentleman."

Both girls winced a little as his cold hands touched their sweaty backs and pulled them backwards a bit until their butts and slits met and they were leaning on each other. He then pulled Shannon an inch away from Carrie and slit the metal cylinder in between and wedged it between each set of pussy lips, producing gasps from each of the girls.

"Ladies, part two of your punishment is to stay in this position until I come and get you, roughly 15 minutes after the bell. That means you will stay like this for the next 40 minutes."

Moans of anguish from the girls, who did not think they could stay in such an uncomfortable spot for so long, especially with the cold metal wedged inside their moist sexes.

"If either of you moves and this cylinder falls, the punishment will be double your current nudity. Is that clear?"

Both girls shivered but said yes in unison. The assembled crowd laughed at the funny way the girls were standing and forced to stay.

"Oh and one other thing," Mr. Kelly said before reaching over and switching a button that made the cylinder vibrate. "Enjoy ladies."

The groans turned to moans as the vibrations felt good inside of them. Shannon knew the feeling and hated what was happening to her body. She was going to cum and hoped to God that no one knew. Also, the wetter she got, the more slippery the cylinder became and the possibility of a slip became greater.

Out of the corner of her eye, she saw Mr. Kelly put a sign up that said, "Please do not touch Carrie Bartlett and Shannon Malone, our nude students, with your hands. Punishment is one day of nudity."

One day of nudity, she thought. Carrie got three weeks for less than that. She tried to take her mind off of the terrible buzzing between her legs but it was getting more intense. She felt Carrie's body swaying and whispered."please Carrie, stay tough.we have to keep it there. Think of something else."

Both girls tried to take their minds off of the intense pleasure building in their loins. Carrie thought about the terrible trouble she was going to be in at home and what her father would do to her. Shannon tried to think about basketball or something gross, but it was no use. The orgasm was coming and coming fast.

"Caaarrieeee.ii can't sstop itt. I'mm going to cumm.heelppp mee! AHHHH!" The girl's body shook as she grabbed her ankles tighter and tighter to try and keep from moving. Her vibrations sent Carrie over the edge who cried out in anguish from her second public orgasm of the day. Both girls were exhausted from their impressive climaxes but somehow they managed to stay pressed tightly together avoid having the vibrating cylinder slip away.

"Great job," they heard a girl's voice say and heard applause from the gathered crowd. Carrie cringed when she heard the voice.it was Emily, the girl that she had humiliated in photo lab.

"Wow Carrie, I always knew that you and Shannon were close, but never this close.cumming together, how sweet. Must feel nice to know that your pussies are so close together that you can feel the same vibrator. Cool huh."

Both nude girls wanted to say something back but knew they were not exactly in a position of power. Carrie also knew that she deserved some of this after the trick she pulled on Emily earlier.

"Emily," Carrie said, her voice muffled and strange from being bent over. "I'm really sorry for what happened in photo lab. I was angry and you were being mean."

"You think that was mean, wait until you see this."

She heard the girl take the lid off of something and smelled it.it was a marker.

"Emily, don't, please. You'll get a punishment, read the sign."

"I'm not going to touch you, the marker is. I just want people to know the kind of person they are dealing with."

Carrie saw the girl approach and felt the marker on her ass cheeks. She stayed totally still, even as the marker made letters on her ass. Whatever was written must have been humiliating because the gathered students pointed and laughed.

"Now the front," Emily said as she wedged herself in to write something on the girl's breasts and then on her thighs. Carrie and Shannon could both plainly read what had been written on the thighs."I like it here" with an arrow pointing up towards her slit. Shannon saw that the writing on her breasts said, "Moo Moo" on the left one and "Squeeze for good luck" on the other.

Carrie closed her eyes, knowing that the marker would be hard to scrub off.

"Now, to earn three extra weeks for you and six more for your lesbo friend, try and stay still now."

Carrie felt it at her side, a slight tickle. Then it got more intimate. She looked up and saw that Emily was using a feather to tickle her sides and her breasts. She was trying not to squirm but, like most girls, her breasts were very ticklish. Then she felt it tickle her asshole and she jumped. Somehow, her ass maintained some sort of contact with Shannon's and the vibrator stayed in but it dropped a little and any more would be the end.

"Oh God, please no, Emily, please stop.I'll do anything if you stop," Carrie said.

"I'll stop.right after this feather touches your little puss.try and stand still now."

Just as the feather was about to touch her slit, Mr. Kelly came out.

"What is the meaning of this," he asked Emily. "Did you not read the sign that said don not touch? That meant no touching."

"But sir, I did not touch them, the marker did and the feather did. Not me," Emily answered in a sweet voice.

Mr. Kelly looked at the girl and grimaced. He was afraid that she was right but this was to stop.

"Alright, you got me, but now I want to be made clear. No one is to touch these girls at all, not with an object or their hands. Got it Emily?"

The girl nodded, giving a hateful smile towards Carrie, who could barely see and was lightheaded after the tickling attacks and the fact that her head was upside down.

"Alright, girls, 10 more minutes. Everyone can watch these girls but no more touching. Let me readjust this vibrator for you so it doesn't fall."

Mr. Kelly reached between the asses of the two tortured girls and pulled the vibrator up higher, causing the girls to breathe a small sigh of relief. The crowd started to disperse but when the bell rang, the hallway filled again. Everyone came by to have a look and many got a laugh from seeing the writing on Carrie's ass. By now the girls were almost too lightheaded to care but they continued to see the feet and legs of their schoolmates, the girls in their saddle shoes and blue socks or tights and the boys in regular brown shoes, socks and pants.

The time was almost up when Shannon felt that familiar tingle again. "OHH God, no," she said as quietly as she could.

"What Shannon," Carrie whispered.

"It's happening again," she said, squeezing her eyes shut.

"No, Shannon, no. I'm too weak to handle it. We're almost there. Hold off please."

"OHHH GODD! I can'ttt! UHHHHH!"

The noises came out like little squeaks as the girl did her best to hold off the orgasm. Her whole body tensed but her ass remained tight against Carrie.

"Shannon, hang on, I know it's awful."

"Alright girls, time's up. You can let go."

Shannon let out a loud screaming orgasm and fell to the floor, curling up in the fetal position. She then screamed as her muscles burned from being in the same position for so long. Carrie could barely stand erect and needed help from Mr. Kelly to get into a full standing position, groaning as her back straightened. The vibrator fell to the ground with a clang and everyone gasped when they saw what was there. They had wondered what the buzzing was and what had sent poor Shannon over the edge.

"Oh jeez, girls, I'm sorry about the writing. I thought the sign was clear. Honey, go to the showers and try to get it off. Maybe Shannon can help you when she comes back to Earth."

Carrie walked gingerly over towards where best friend laid curled up in a ball of exhaustion and humiliation. Two forced orgasms in plain view of everyone, but the second one had been the most powerful one she had ever had. She was so embarrassed by the fact that everyone knew it too.

"It's alright Shannon, you were right. We did it together.we made it!"

Shannon looked dazed as she looked up at her friend. She heard the words but was not comprehending.

"Come on, come with me to the locker room and help me get this marker off."

Carrie grabbed Shannon's shaking hand and helped her to her feet. Shannon winced as her legs straightened but soon had her wits about her and followed Carrie down the hall. When her eyes got lower she saw what Emily had written.

"Oh God, Carrie, this is awful."

"What?"

"The writing," she said, pointing to Carrie's asscheeks.

"What does it say, Oh God, I hope it comes off."

"It says, I like it back here, push it in hard."

Carrie turned white as a ghost. "Please walk close so no one can see it. Oh God, I hope it comes off."