The Erotic Mind-Control Story Archive

INVENTION

Part 1

Sandy Wilson looked at the rat in frustration. The aluminum foil electrode he had glued to Ms. Piggy’s head had come loose again, and she had rubbed the spot where it had been attached until the skin had broken, making it useless for his purposes. He’d have to find another place to attach an electrode, and that meant another hour of carefully shaving the rat’s tiny head. Still, he hadn’t got a good EEG tracing from the spot on top, so he probably was better searching for another, maybe farther back on the cortex..

He sighed and lifted the plump warm animal, cupping her in his hand. Ms. Piggy didn’t seem to mind the shaving, because he worked carefully and fed her slivers of moist cat treats while he worked. Eating was her favorite pastime, which was how she earned her name. That and the fact that she chased Mr. Ed, the male mouse, around the cage, nipping at him until he huddled in a corner. Unless she was in heat. Then she let him mount her, but immediately afterwards began biting him again. Mr. Ed seemed resigned to this peculiar form of courtship, taking what he could get when he could get it. But otherwise he avoided the female rat completely. Sandy had carefully charted her menstrual cycles and knew she still days away from any friendly interest in Mr. Ed. He knew better than to toy with her during her single-minded pursuit of the male animal. She should be safe to handle today. As always, he talked to her while working the fingernail clippers, then shaved the stubble carefully with a scalpel held in a metal jig..

Finally a round quarter inch spot was clean. He took an alcohol swab and touched it to the area. She flinched at the cool swab, but didn’t squeal. He lifted a pre-pasted dot of foil and pressed it onto her scalp, then deftly attached the electrode, sliding it into the small copper tube he’d soldered onto the foil.. He the rat her into the recording box, small enough so she couldn’t turn around or reach the electrode. Ms. Piggy smelled the lettuce cuttings in the box and immediately began stuffing them into her mouth, eyeing him while she chewed the leaves. Sandy turned on the recording equipment, watching in satisfaction as the scope showed brain wave tracings. He had apparently stumbled on a good spot, for he was getting clean sharp waves of brain activity.

This was his junior science fair project, building on his sophomore project, which was chemical analysis of hormones from rat urine. He was charting the changes in brain waves against the rat’s chemical changes, looking for correlations. His previous female subject, Stinky, was Miss Piggy’s mother. She had gotten him all the way to the State Science Fair, where he won Honorable Mention. This year, he wanted to take First Place, and was determined that the methods he used were meticulously scientific. He noted with pleasure that Miss Piggy was pissing in the box, a conditioned response he’d trained into her since her infancy. The yellow fluid collected in a test tube fitted to the hole in the bottom of the box. He’d have to start all over again, measuring the hormone level in the rat’s urine and comparing it with the tracings from the new location on her head. He’d long gotten over his distaste for the sharp smell of the rat urine, but still wore latex gloves whenever he worked with it, hating to get the yellow fluid on his hands.

The electrode was his own device. He’d built it using a tiny Hall effect junction removed from an airplane navigation system, lifting it out of its plastic case with tweezers and gluing it to a FET which he’d pried from its own case, wrapping the pair carefully with speaker wire to form a tiny tuned inductor, highly sensitive to the smallest changes in an electric fields when excited by an oscillator, and he’d build a bank of active filters, run into an analog neural network constructed from capacitive diode junctions to remove unwanted electrical signals. He checked that the tracing he wanted was complete enough to analyze. Ms. Piggy was still toying with the last of the lettuce. He didn’t want to disturb her, so he fiddled with the tuning of the oscillator, varying the frequency while watching the amplitude of the brain waves reflected on the oscilloscope. He was getting nothing but noise now, and was trying to decide how to better shield the leads to simplify the filtering. He noticed that every time he moved his hands the tracing would change. The device was behaving like an ultra-sensitive proximity detector, not like a brain-wave monitor. He increased the amount of 60 cycle current into the neural net inhibitors, hoping to suppress the effect. Suddenly Ms. Piggy’s body quivered and she let out a tiny squeal. He turned off the power immediately, afraid he’d somehow given her a shock, then realized that the ultra-thin speaker coil wire he was using for the electrodes could hardly carry enough current to hurt her without burning through. He turned the oscillator back on, trying to remember the settings he’d run through, and watched the animal carefully. Again she quivered and squealed, then unconcernedly returned to nibbling at the lettuce. He checked the pen recorder tracings, and noticed two sharp sets of spikes.

Sandy thought carefully. He wondered if he had somehow induced a brain wave in the small white furry animal. This was unexpected, at the least. Perhaps, he thought, the tracing reflected some design flaw in his equipment. Maybe he’d started an oscillation that quickly built up a large current at some fundamental frequency he hadn’t filtered. He carefully removed the electrode from the piece of foil, then tried the oscillator sequence again. No spikes appeared. Maybe Ms. Piggy’s body was necessary for the proper currents, like a load on the coil. He picked up another piece of foil and stuck it on the naked skin of her tail, using the same glue. Again he ran the oscillator cycle. Again he got the spikes, and a shiver from that rat. But both were much smaller. He returned the device to the foil on her head. This time he programmed the sequence of oscillator frequencies into his computer, having wired it long ago to excite the coil with variable waveforms to get the greatest sensitivity from his sensor. Ms. Piggy didn’t seem to mind, her body only shaking slightly at his touch. He tried again, and again he got the strange spikes and the same quiver and squeal. He pasted another electrode on the scar tissue, hoping it wouldn’t hurt her when he peeled it off later, and tried again. The same squeal, and the same strange tracings.

He thought a while, realizing that his new amplifier was obviously involved in this effect. He looked at the tracings carefully, noticing that the waves showed some sort of feedback effect, from the rat’s faint brain waves through the excited coil and magnetic junction, then amplified back through the device.

Sandy knew the electronic characteristics of his device quite well. He returned the mouse to her cage and lifted another sensing device out of its box, quickly wrapping a larger coil around a pencil, cutting the fine speaker wire on the device and soldering the new, larger coil into place. He cussed as the fine wires curled away from the soldering iron, the head too intense for the thread of copper. He wrapped another coil, then soldered it more carefully, this time succeeding. He lowered it into Miss Piggy’s cage, holding it a few inches over her head. The rat didn’t seem concerned. She was used to strange devices by now. He tried to reach the computer keyboard but the rat wandered out from under the coil before he could begin the sweep. He typed the required command sequence, programming it to repeat every second, then held the coil over her head. Again he saw the familiar shivers. She walked directly to Mr. Ed and Sandy knew she was going to begin her familiar ritual of torturing the male animal. Sighing, he reached to take her out of the cage. He wasn’t finished with her yet.

To his amazement, however, as soon as she reached the male animal she presented herself for coitus, front paws spread and her rump up.. Mr. Ed took immediate advantage of the opportunity, sniffing her in confusion, then mounting her from behind, pushing his cock into her and pumping hard.. Sandy marked the urine sample, wondering if he’d missed something in her estrus cycle. He watched the rats go at it for a few seconds, then lifted Smurfette from the cage, thinking he would try another animal to get the strange feedback effect. He put the young female rat in the lettuce box and lowered the coil. Smurfette was Miss Piggy’s daughter. He started the equipment and was pleasantly surprised to find that this animal responded the same as her mother, without the squeal, her sexual arousal obvious as her little body quivered.. He reached toward the box, and Smurfette bit him. This was unexpected, too, but the bite didn’t hurt. Sandy dabbed his finger with antiseptic from the bottle he kept near the rats’ cages, thought about writing the results of this experiment in his lab notebook, and decided he’d wait to see if the effect could be repeated. He lifted the coil, but the fine wires broke. He tried several times to solder a new coil, but couldn’t get it right. Frustrated, he switched off the equipment and went upstairs..

The next day Sandy built several new electrodes.. This time he didn’t have any problem soldering the thin wires. Somehow his hands seemed steadier. He found he could replicate the effect at will, holding the thin coil over the rats’ heads with tweezers. The coil seemed not to affect male rats much, but it had a decided and immediate effect on female rats, causing an immediate sexual arousal. He was playing with the coil, trying it on all his rats at once, two male-female pairs and his two extra females. The two females, isolated from any males, were the most interesting. One of the females would assume the male position, trying to mount the other while both of them squealed excitedly. The next several days he repeated the experiment, trying various combinations of oscillators and filters, and tuning the circuits to maximize the effect. He found that by using more loops on the coil he could make the rats fuck from several feet away, by having two separate coils, one which seemed to act as a receiver and one which acted as a transmitter. The rats didn’t even have to be between them, as long as they were close.

He was spending more and more time in the basement, unable to pull himself away from the experiments. About a week later, he was still working on his project. He had built a bigger capacitive diode array, hoping to expand the work to other appetites than sex, but wasn’t getting any results, except faster sexual reactions. He turned sharply as he heard his older sister Samantha coming down the basement stairs. He realized that he was embarrassed to be caught watching the three pairs of mice fucking madly away in the glass cage. His sister was a year older than he, and about the most prudish person he knew. He thought that if she weren’t his sister, it would be a terrible waste. She was a year older than him, just turned seventeen and one of the prettiest girl in school. She had a pretty face, even beautiful in an all American way, and a well developed body with full firm breasts and a narrow waist leading to nicely shaped hips and long shapely legs. He knew that some of the boys thought she was an awful tease, but that wasn’t it. It was just that she didn’t seem interested in sex, or even to really understand that sex was a part of every teenage boy’s interest in girls. Sammy complained to him sometimes about boys, but Sandy always avoided the conversations, embarrassed..

Samantha, whom everyone called Sammy, wasn’t half the student he was, but her athletic ability had won her a gymnastic scholarship to a good college. She was serious about schoolwork, but never really got into it. She didn’t share his interest in science, preferring to study sports, and was looking forward to the end of her senior year. She’d been on the Tri-County gymnastic team, and had almost made the State finals, losing out last year to a potential Olympic contender. She’d also been a cheerleader for three years, and was captain of the team. Most of the really pretty girls that Sandy had dated had met him through her. He was regarded as nice by her friends, he supposed, but sort of dull.

“What’s so interesting?” she asked, walking over. She still had on her cheerleading outfit, carrying the bag with her sweater and pom poms.

“These rats,” Sandy replied, covering the cage with a cloth. “They’re not doing what I expected.”

“Ugh! They’re so gross anyway. You can keep that cover on the cage, thank you very much. What are they doing that’s not expected?”

“Uh, they’re not eating the cat food pellets,” Sandy lied. “They’ve always liked them before.”

“Maybe you should try rat food like everybody else,” she said. Sandy couldn’t tell whether she was serious or making a joke.

“Maybe,” Sandy said. “Look at the new device I’m building.”

Sammy leaned over and looked at the larger coil of wire. “What’s it do?”

“It oscillates,” he explained. “In a funny way.”

“OK, but what does it DO?”

Sandy turned on the equipment as his sister leaned over the coil, looking at it closely. “It’s bigger than the little things you’ve been building before.”

She reached out to it up as he started the playback device.

“Don’t touch it,” he warned. “It’s set to oscillate by itself.”

“Is it dangerous?” she asked, pulling her finger quickly away.

“No, no. It just won’t work the same if you’re touching it. It picks up body currents.”

The oscilloscope tracing jumped as Sammy quickly inhaled, shivering. “Oh!” she exclaimed, backing away. “Did it just give me a shock? I just got a really funny tingle. And I, well, I don’t know. I think it gave me a shock!”

“No, it can’t do that. I think it just picked up your shiver. If anything moves fast, then the electric field changes, and it’s really sensitive to that. It’s cold down here, and that’s probably what caused the shiver.”

“Probably,” she said, looking a little doubtful. “Are you sure that thing’s safe?”

“Oh yeah,” he said. “It carries current only in the milliamp range. Watch, it’s about to cycle again.”

“Look, I’ll turn the current down by half,” he said as Sammy backed away, looking concerned. “But there’s no way it could have shocked you. You get more current walking past a florescent bulb!”

Sammy came closer and watched as the device appeared to do nothing. She didn’t seem to notice that her fingers flexed just when the device oscillated, the tracings on the oscilloscope converging into a complex pattern he didn’t recognize. But Sandy noticed, wondering why it didn’t have a similar effect on him. He watched as the neural net tried to stabilize the signals, which finally converged into several complex overlapping wave forms. “OK, so it doesn’t do anything. Then what’s it good for?”

“It’s a sensitive detection device. A measurer,” Sandy said. “That’s all. It measures tiny electric currents, using what’s called phase matching to make itself even more sensitive. Sort of figures out what you want to measure, then does it for you. It really means I don’t have to paste these electrodes on the rats.”

“Lucky for the rats,” Sammy laughed. The scope tracing flickered again, showing that the neural network circuits were trying to stabilize a new pattern. Then they settled into the old pattern as Samantha’s fingers flexed in time with the cycles. Again she didn’t notice. She ran her hands over her blouse, smoothing her uniform. To Sandy it looked like she was squeezing her breasts. “I gotta go upstairs now.”

“What did you want to tell me?” Sandy asked her.

“It can wait,” she said, suddenly seeming upset. “I really gotta go upstairs, Sandy. I mean, I’ll talk to you later, okay? It’s too cold down here! I keep getting these shivers.”

Sammy turned suddenly and ran up the stairs. Sandy watched her, trying to figure out if she still thought the device was dangerous or what, then turned the current up, to the maximum range he thought the thin wires of the coil could handle. He pulsed it while his eyes were closed, trying to feel something. He thought that he felt the hair on the back of his neck rise a little. He tried again, feeling the same thing, then switched it off. He lifted the cover of the rat cage. One of the pairs of rats was still fucking furiously. One male rat was panting exhausted while the left out female was licking herself between her hind legs, her paws trembling violently, and the two female rats were pushing themselves against the side of their cage, trying to get to the male rats..

Sandy made sure everything was turned off, then left the rats, knowing they’d be okay. They’d all been through this before, and the only noticeable effect was a subsequent increase in their sleeping cycles, although the hormone levels of the female rats would go way out of wack for a while. He climbed the stairs, wanting to talk to his sister. He knew he couldn’t tell her about the rats. She’d be furious that he’d exposed her to the device. But she’d wanted to tell him something, he knew, before she left so suddenly. He got to the first floor, but she wasn’t in the den, or the kitchen either. He went upstairs to where the bedrooms. Maybe something was wrong with her. When he got to her bedroom, the door was closed. He raised his hand to knock, then paused, listening. He could hear strange noises coming from her room.

“Unnnnh! Unnh!” he heard. “Ahhhh.... oh!”

He waited a second, then heard another noise, like a cough, but longer.

“Oooh! Aaaah! Unnnnh!!”

He quietly turned the knob on the door, opening it a fraction of an inch and peeked through. His older sister was lying on her bed, still in her yellow and blue cheerleader’s uniform. But the short, satin-lined skirt was yanked up to her waist and her eyes were closed. Her knees were raised. Both her hands were stuffed into the tight yellow pants of her outfit. He could see her fingers rubbing right over her crotch. He couldn’t believe that his sister was frigging herself, but the evidence was unmistakable! He watched for a moment longer as she pulled one hand out from under her pants and moved it to her chest. She began kneading her breasts through the top of the uniform while her fingers worked in her pants.

Her body began to shake and she pointed her toes, rubbing herself faster and faster. Then, making one final groan, she rolled over on her stomach, her body writhing and her short skirt flapping up and down over her rear. He saw her face beginning to turn towards him and quickly closed the door, jumping at the slight click of the catch. But the noises continued unabated. His sister hadn’t noticed.

His head whirled as he walked down the stairs to the living room. His sister was upstairs frigging herself, right after being exposed to the device. Just like the rats! He wondered what her boyfriends would say if they could see little Miss Perfect working her fingers into her panties, obviously rubbing her pussy!

Sandy had tried to get peeks at his sister’s body before, but had never seen much, just an occasional view of tit inside her bathrobe after she took a shower. He knew she had a reputation as an ice maiden. He’d heard some of the kids at school joke about it. She’d never do anything except kiss, and then not even with her tongue. But the picture of her working at her pussy, at her snatch, at her sexy cunt, burned in his mind. His sister had sexual desires, just like he did, and she was upstairs fingering herself on her bed, just like he’d wanked his dick beneath his covers at night. He knew what his fantasies were—he dreamed of screwing the ever girl at school, pretty, ugly, fat thin, it didn’t matter. His horny cock wanted all of them and at one time or another he’d pictured himself fucking them. He wondered what she was thinking as she masturbated, which of the boys at school she had pictured in her mind.

He shook his head. He guessed that the rapid onset of his sister’s sexual desires hadn’t been entirely natural. It just wasn’t like her. Maybe, he fantasized, he’d invented a sex machine! And it didn’t work only on cats and rats, but on people, too. If it would work on Jennifer...

Jennifer was his main girlfriend, or had been. She was average looking but smart, one of the few girls who seemed to understand Sandy’s serious nature and his long-winded explanations of the physics of almost everything. And, as far as he knew, she was a virgin. She seemed intent on staying that way, too. Their last date she’d let him kiss her, and even touch her breasts through her blouse. He remembered kneading the soft flesh with his fingers. But he had tried to undo her buttons but suddenly she got highly offended. She told him she wouldn’t go out with him if he insisted on trying to take her clothes off. He’d told her that he couldn’t stop himself, that she drove him crazy. They’d had had a full blown argument, although he didn’t really understand why. Jennifer had walked away, leaving him with a hard-on that didn’t go away until he got home, disappearing into his room for a self-inflicted hand job. The hell with Jennifer, he thought, still half fantasizing. Now he had his Device.

He’d begin thinking of it with a capital letter—the Device. Maybe it would work on Tammy Brown, the prettiest girl in his school. Or on Miss Elgin, the sexy-looking English teacher with the most bodascious bod he’d ever seen. Or on Mrs. French, the big-titted divorcee, the woman he gardened for to get the money to buy his equipment. But first he’d have to find an excuse to get them alone in his basement. Sandy laughed to himself. It was like catching birds by putting salt on their tails. Nice if you could get that close. Then he realized the solution. He’d have to make a portable version of the Device!

His fantasies were interrupted as he heard water running upstairs. In a minute his sister came down. She’d changed into tight jeans and a sweater. He looked at her with new interest, seeing the slight mound at the vee of her crotch and noticing how her breasts made nicely rounded mounds beneath the woolly material.

“Hey! Are you okay?” he asked her, thinking of the scene he’d watched just a few minutes ago.

“Oh sure,” she said. “Like you said, I just got a chill. So I put this sweater on. How can you work down there when it’s so cold?”

“I’m just used to it, I guess. You sure you’re all right?”

“I’m fine,” she said, looking a little annoyed. Then she smiled. “Just fine.”

“What were you going to tell me?”

“Oh, let me think.” There was a pause. “Only that I saw Jennifer, and asked if you and she were going to go to the football game. She told me you’d broken up with her, so she didn’t think so. Is that right?”

“I guess. You might say we had an argument.”

“Oh, I’m sorry. About what? I really liked her!”

“I don’t really know. It was sort of stupid. But maybe I’ll call her to apologize. I just don’t know what we were arguing about, really. We just got angry. I was thinking of apologizing to her anyway. I believe we can work out whatever the problem was.”

“I guess that happens. Things just blow up. For us, I mean kids our age. Like sometimes we get these emotions that just sort of take over, you know.” Sammy looked a little confused, but continued. “It probably has to do with hormones, or something, just running wild. I mean like sudden changes of mood. You know about that stuff, don’t you? Hormones?”

“Well, I’m not a doctor or anything, but I know something about hormones, I guess, from the chilly basement.”

“Like, is it normal sometimes to just get overwhelmed by anger or other stuff? I mean to just have it sweep over you? Feelings about someone? Is that normal?” Sammy looked embarrassed.

“I think so, if I know what you mean. It happens to everybody.”

“Umm . . . Okay. Anyway, if you and Jennifer get back together, maybe we can drive to the game together. With Tommy and me, I mean.”

Tommy was his sister’s current flame. He was on the football team, and he had his own car. Sammy was a cheerleader, and went to the games with him. But she’d never invited her brother along before. She knew that football wasn’t high on his list of interests. Now she stood in the living room looking at her brother, waiting for a response. Sandy thought a minute, then agreed.

“I just thought we should do more stuff together. You and me, I mean. Like double dating.” Sammy looked embarrassed, then shrugged and walked into the kitchen. He could hear her opening the refrigerator, and had a wicked picture of his sister as one of his experimental rats, biting into a head of lettuce. His thoughts returned to his Device, and he began to devise ways to make it portable, small enough that he could carry it around without anyone noticing.

Let’s see, he thought. If I use five or six nine volt batteries with a step-down circuit and low power FET amplifiers, I could probably fit it into a knapsack and still have enough power for four or five hours at the minimum. I’d have to get a portable computer, maybe a notebook type for a control device. I can’t see myself turning knobs on the middle of a date. ‘What’s that? Oh, just a new radio. Take your panties off and watch the movie.’ Never work. Need a computer. Damn, I don’t have enough money for that. Maybe if I mounted a microprocessor inside the power supply?

He began designing new circuitry in his head, with a smaller power supply and a bigger coil. He could run the control computer—now there’s a funny term, he thought—off the same power unless there was some other feedback problem. Maybe it should have a rechargeable supply for the amplifiers. He wondered if his father would miss the batteries from his rechargeable drill. He decided he could rewire the drill just a little he could probably arrange to get the batteries. So many things to do. So little time. . . By late Friday night Sandy had completed his smaller model. His father had used the drill, as expected, to complete the bookcase he’d been building, and the flash and smoke from the slightly modified motor were impressive. Sandy asked if he could have it for his Science Project, and his Dad had given him the still smoking tool, telling him to be careful with it. He lifted a microprocessor from his school science room, realizing he was stealing, but not really caring about such fine points of morality. Science was at stake here. He carefully wrapped a new, larger coil, with the same thin speaker wire, unwilling to make too many changes for fear the Device would have some awful side effects, soldering it with great care onto the last of his junctions.

Sandy was afraid to test the new Device, thinking that perhaps some flaw in construction would cause it to scramble his own brain waves. He went to his closet and got a football helmet, sticking aluminum foil all over the outside for shielding. Then he unwrapped screening left over from the breezeway, piling it over his rat cage with the Device inside. He rigged a remote control and went into the next room. He couldn’t think of any way to shield it better. He held his breath and turned the Device on. He waited, counting for four or five pulses. That would have been enough for the other Device, he knew.

He switched the Device off, pulling off the shiny helmet and reentered the room. The coil was still mounted on the outside of the rat cage, and was pleased to see that the female mice were healthy, approaching the males. Within minutes the mice were happily copulating, fucking their brains out, in fact. He left the helmet off and gave them another jolt. The females all exhibited that characteristic quiver, but his brain stayed intact. In fact he felt nothing at all.

Using the old Device, Sandy had discovered that pulsing the oscillator in half-second bursts worked better than a steady current, and had fitted that improvement into his new model, its timing controlled by the stolen microprocessor. The new Device fit easily into a small padded sack that Sandy had found in the garage and fit easily into his knapsack with space left over for schoolbooks. The wonders of miniaturization, he thought. Now he needed a date. He had decided to ask some girl to walk by the lake with him. He could pack a lunch in the knapsack. There was plenty of room. He knew just the spot, but hadn’t picked the girl.