Elyssa Sykora was pretty close to perfect - due, possibly, to genetic tampering from her evil scientist father. She had the body of a mudflap girl, the reflexes of a mongoose, and the brain of a Nobel Laureate. She could pick up skills in a week that would have taken most people a year to learn. She was good at everything.

Still, it did take her a little time to master something new. That’s how she ended up losing the table tennis bet with Amy.

“So when you said you’ve played ‘a bit here and there’, what you meant was...?” Elyssa asked after Amy scored the winning point.

“What I meant was state championship. Was I not clear?” Amy replied smugly.

“Nice hustle,” Elyssa admitted.

Amy and Elyssa had been enjoying an informal rivalry at survival camp. This was their first full day back at the barracks, after weeks out in the woods. Having already learned how to make shelter and trap game, they were now back, sleeping in real beds and using real toilets, while they learned more civilized skills such as digging wells and tanning hides.

“Okay, so what do I have to do?” Elyssa asked. The terms of the bet had been vague - just that the loser had to perform a dare issued by the winner.

“You have to ... give a blowjob ... to...” Amy began, drawing out her dare for dramatic effect. The other girls of the group, Miranda and Kelly, fidgeted eagerly with anticipation. Elyssa kept her cool. “Quinn!” Amy finally announced.

Elyssa shrugged her shoulders with frustration. “Come on, really?” she said. “You saw how hard I had to shut him down last week. If I give him mixed signals now, he will never understand ‘no’ from any girl he crushes on for the rest of his life!”

“Yeah, but he’ll probably just stay fixated on you until you eventually kill him,” Amy said.

“Judges ruling?” Elyssa asked, looking to Kelly and Miranda for a way out.

Kelly spoke up, “You just said a dare. This doesn’t hurt anyone. It’s not illegal. It’s fair. As long as Quinn is willing, that is.” Miranda shrugged in agreement.

Elyssa sighed as she thought through her problem, and then finally spoke. “Okay, I’ll do it. I’ll need a day or two to prepare. I’ll give him the best blowjob of his life, but he won’t know it’s me doing it. If you guys promise to keep it a secret, I guarantee an interesting couple of days. Deal?”

“Well, I’m intrigued. You’re on,” Amy told her. Kelly and Miranda agreed as well.

The next day at dusk, Dr. Sykora’s assistant showed up in a van, and wheeled a trunk out to the girls’ cabin. “Elyssa,” he said nervously, “you’re sure your father will approve?”

“Relax, Moffet,” Elyssa said, giving him a smile and a hair toss that she knew he couldn’t resist. “Nobody loves a prank like Dad!” Moffet was still concerned, but like most men, he couldn’t say no to her.

“What is all this stuff?” Miranda asked.

“Just wait - all will be made clear tonight,” Elyssa said with a twinkle in her eye.

That night, the girls were all awakened by the sound of Elyssa unpacking and assembling her father’s machine. When the lights came on, they saw three towers, like tall skinny speakers, arranged a few feet apart and facing inward. Each had a thick wire leading from it to a cube-shaped computer with a touch screen. An ordinary power cable connected it to the wall.

“If you girls are ready, in a minute I’m going to go over to the boys’ cabin and fulfill my obligation.” Elyssa said. “While I’m gone, don’t touch anything.”

“What does all this do?” Kelly asked, but Elyssa ignored her. Instead, she stripped off her sleeping clothes. All the girls stared. They had seen her naked before, of course, but this was the first time they had liberty to really look. Each girl, whether consciously or not, cataloged Elyssa’s beauty, trying to find fault with it. Her shoulders were strong and smooth. The straight brown-black hair that draped over them was shiny and full of bounce. Her breasts were large and perky. Her waist was small, with a well-muscled abdomen. Her butt was heart-shaped and tight, and her legs were long and strong. The only fault the girls could find was one that they all shared: her pubic hair, normally immaculately groomed, showed weeks’ worth of neglect.

Elyssa punched a button on the control panel, and then stepped between the pylons. She raised her arms at times and twirled around, as if she were taking a shower or receiving a spray tan. Slowly, the color of Elyssa’s skin began to shift. At first she took on an algae-green tint, as her body stopped reflecting red light. Then, more and more, she became a translucent blue shadow. Within a minute, she was invisible.

“Holy crap,” Kelly finally said.

“My dad’s an inventor,” Elyssa answered casually. “I’ve got to go - not sure how long this lasts. Someone set a stopwatch, okay?” The three girls watched as the door opened and closed, seemingly on its own.

The boys’ cabin was a good deal more crowded than the girls’, but the lights were out and nobody was stirring. Plenty of moonlight crept in through the windows, and numerous tiny LEDs indicated the charging status of their devices, so Elyssa had no trouble finding her way around. She found Quinn lying on his back in a bottom bunk. He subconsciously grasped at the covers as she peeled them away, but he didn’t wake. Kneeling beside him, she stroked the underside of his scrotum through his boxers to try to get his attention. Failing that, she dug her hand inside his shorts and raked his balls lightly with her fingernail. That woke him instantly.

“Shh,” Elyssa whispered to him. Although frightened, Quinn didn’t make a sound even as he felt his boxers sliding down to his thighs, leaving his junk exposed. Some unseen force massaged his balls, coaxing an erection. When the unmistakable feeling of a hand squeezed his cock and slid its skin up and down, he reached out. Elyssa intercepted the confused boy’s arm and, digging a thumb into a pressure point, immobilized it.

The feeling of warm wetness at the tip of his cock was like nothing Quinn had ever felt before. It felt cozy, comfortable, intimate. He was sure this must be the feeling of a woman’s mouth - oral sex - but there was nobody there. He could see his dick, all alone, pointing skyward. He stammered.

“Shh,” Elyssa coached him again, and Quinn fell silent. Now the warm wetness had a sense of movement to it, and pressure: a tongue. It was covering more of his cock, and moving up and down. No longer teasing, the magical force visiting him stimulated him with determination: it wanted him to come. There was suction, too. And the skin of his shaft was being slid up and down vigorously, with an occasional twist. At the same time, his balls were being rubbed and tugged. It was all just too much - way beyond any experience he had ever brought on himself. Quinn’s cock exploded, pulsing out semen, over and over again. Even as the rush of orgasm hit him, Quinn could feel a mild ache in his abdomen, from his now-empty sex glands.

Elyssa caught herself just in time. Normally she would have swallowed her partner’s come without a second thought, but this time she let it dribble down his pole, mixed with her spit. The semen inside her might be visible, she feared: what would it look like mingling with the invisible acids in from her stomach? She decided not to take the chance. She backed away and watched as Quinn took off his boxers and cleaned himself with them, with a panicked urgency.

All voices stopped when the door to the girls’ dorm swung open and Elyssa returned.

“He’s going to have a hell of a story to tell tomorrow,” Elyssa said, sitting on her bed, while the rest of the girls scanned around for her with their eyes.

“What did you do?” Miranda asked, full of wonder.

“I sucked him off,” Elyssa said with a touch of impatience. “I think it might have been his first blowjob - but it’s not like we talked or anything.”

Pressed for details, Elyssa went over the story as best she could. Slowly her image returned to her: first a bluish haze, then a dark blue silhouette, then opaque aqua skin, and finally her normal appearance.

“I’m going next,” Amy announced.

“What do you mean?” Elyssa asked, withholding her approval.

“Tomorrow night, I’m going to use your machine and then go give Quinn another blowjob,” Amy asserted. “Nobody says anything to the boys about any of this.”

The next day at breakfast, Quinn was the center of attention.

“Ladies!” Larry said as Elyssa, Amy, Kelly, and Miranda approached. “Was your cabin by any chance visited by ghosts last night? Because Quinn said he got a terrific blowjob from a ghost last night, and we were wondering if you experienced the same thing.”

“I never said it was a ghost!” Quinn objected. “I just said that something gave me a blowjob last night, and that I couldn’t see it.”

Elyssa responded: “Quinn, are you sure it wasn’t just a wet dream? It’s nothing to be ashamed of.”

“No, I was awake, I’m sure of it!” Quinn insisted. “And when I tried to reach out to whatever it was, I couldn’t. My arm suddenly went numb and limp.”

Kelly chimed in: “But your dick stayed hard?” Quinn just shot her a frustrated look.

“No, I get it - I totally know what you’re talking about,” Amy said. “I was visited by a ghost last night, too. This was after the rest of you fell asleep,” she added, looking around to the other girls. “Some translucent viking dude pounded by pussy for hours. He shot ghost come up into my cervix, and now I’m afraid that I’m going to give birth to little translucent babies!” All of the guys laughed riotously.

Miranda broke through the laughter with a sincere tone of voice aimed at Quinn. “Did you like it? I mean, whatever it was, was it good?”

Quinn seemed shocked by Miranda’s seriousness. “Um, well, yeah. It was the best orgasm of my life.”

That night, after a few hours of sleep, the girls woke up to Amy’s alarm. “All right, do me,” Amy told Elyssa as she stripped off her clothes and stepped between the pylons. Elyssa activate the machine.

“So what are you going to do?” Miranda asked with a touch of nervousness.

“I’m going to give Quinn a blowjob, of course!” Amy answered. “A better one,” she added with a wink toward Elyssa.

“Are you sure you should do Quinn again? Wouldn’t it make more sense to pick a different boy this time?” Miranda argued.

“No way!” Amy replied as she faded from sight. “Much better if everyone thinks he’s crazy. Besides, he’s already getting teased for this - he might as well keep getting the perks. Anyway, how can I prove that I’m better than Elyssa at this, too, if it’s not the same guy?” Elyssa rolled her eyes.

“I guess,” Miranda said.

“You like him!” Kelly accused Miranda. “You’re into Quinn and you don’t want some other girl sexing him up!”

“No!” Miranda said in a way that very obviously confirmed Kelly’s suspicion.

Fully invisible, Amy bounded off through the door. “Don’t wait up!” she said as she left.

A half hour later, the door burst open again, to the sound of Amy’s cackling. “My god, Elyssa, your Dad has got to sell me one of these machines. This is too much fun! I’ll give you like a gazillion dollars!”