Test subject arrives

“Okay, just remove your clothes and we can get started with the straitjackets.”

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Already unbuttoning her shirt and smiling Isabella responded with “Ooh, I like those.” She had to give a slight wiggle of her hip to get out of her jeans even if they weren’t even close to the tightest she had ever worn. Once she was in her underwear, she gave the doctor a sultry look saying: “I suppose I’ll have to take these off too.”

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The doctor, a slim tall man in his late thirties sporting a spiky mess of blond hair, did a double take in her direction. She was quite the vision in her black lace underwear seductively looking at him. He cleared his throat and replied: “Yes indeed, but worry not, I’ll soon have other garments for you to wear.”

Isabella unhooked her bra, laid it on a chair on top of her neatly folded jeans and shirt and then removed her panties. Doctor was opening a large metal case and appeared to be concentrating hard on looking only at the contents and not the dark naked beauty behind him.

She was enjoying the situation. The awkward doctor seemed kinda hot to her. So Isabella struck another pose and in a low voice went: “Doctor, I’m ready”

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The doctor said: “First we need to do a full body scan. Please go over there, stand in the yellow circle between the sensor poles and hold on to the bars above your head.” She did and the sensor bars quickly circled around her flashing lights at her very fast. Looking at his laptop, the doctor said: “Looks good, though it seems you have a small bruise in your left calf. But it shouldn’t impede the testing. Shouldn’t be contacting any straps in that part of your body with these tests.”

Doctor turned around holding a mess of thick white canvas like plastic and straps. He unfurled it in front of her saying: “Hold out your arms and I’ll help you into this.” Isabella did as she was told and soon her arms were covered in the heavy canvas sleeves. The doctor went behind her to pull the jacket tight and began buckling straps.

It soon became apparent, that this straitjacket wouldn’t cover Isabella’s breasts at all. “Ah it is like a bolero style straitjacket then. Boobs out and all.” Doctor pulled her hands around her torso and while he was adjusting the tightness, replied: “You will soon see why it is setup like that.” He went on to attach some thigh straps and stood up seemingly done.

“Now try to struggle a bit. See if you can slip out of it.” Isabella gave a bit of a pull first, then tried harder, but no matter how she twisted and wormed inside the jacket, it would not let her slip even a little. “Nope, can’t get out.”

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Then she laughed and said: “Doc look, if I pull my hands back a bit, it makes my boobs look bigger!” “So it does.” Replied the doctor. “Since it seems to be secure, it is time for the first probes. Please spread your legs a bit. This is a small one so I can probably just put it in while you are standing there.”

The probes

Isabella lifted her right leg on a chair while leaning against a wall. The doctor knelt in front of her with a lubed metallic probe with straps in it’s base. He started gently working it into her. After it was most of the way inside, he connected the strap to the front of her straitjacket and asked her to turn around. After connecting the strap from the back as well, he adjusted the tightness for a very snug fit.

“Please move around a bit. The probe should not move very much while you do.” Isabella walked back and forth, then did a squat and hopped a bit. She said: “Feels quite quite firmly seated.” “Very well, next I will attach these nipple stims.” Doctor was holding a thin metal antenna with a little bulb at the end. He hooked it on to the side a strap near the boob window of the straitjacket and then adjusted the antenna until the bulb was gently pressing on her nipple. Next he pressed a button on it, and it opened up and immediately slipped over her nub. He let go of the button and the bulb began to gently squeeze her nipple. Isabella cringed a little bit, but it was more out of surprise than any pain. It wasn’t so tight, but it certainly wasn’t going to fall off any time soon. Then he repeated the procedure with the other side.

“Okay, this is already getting interesting. What do I need to do?” Isabella queried. Doctor had gone to his laptop and was typing as he said: “Nothing really. This test will run the stimulators for a while in a pattern and record some sensor readings. Should feel rather good. Here goes.” As he said this, he hit one more key and then the probe between her legs began to vibrate gently at first but slowly building intensity.

Soon after the bulbs clamped onto her nipples also vibrated very gently. At first it tickled, but they immediately varied their vibrations and quickly found an intensity where the sensation was very pleasurable indeed. Then they remained at that speed. The probe inside her also varied it’s speed and intensity several times.

Experiment in frustration

After a few minutes, Isabella felt an orgasm building up very slowly. “Ooh, ah, doc, should I, uh, try to avoid, you know, ooh…” The doctor was sitting in a chair looking at something on his laptop again and without even glancing in her direction said: “Do you mean orgasm? No requirements for this test, if you can cum, feel free. If you can’t no pressure.”

The big O remained frustratingly out of reach. Isabella tried to just relax into it, but the vibrations just weren’t strong enough. Then she tried to buck her hips against the strap, but annoyingly the strap just moved with her hip and she found no purchase for a pumping action. After a few more minutes, she was getting well and truly edged by the probes. And no amount of bucking or struggling was helping. She was considering going to a chair and humping an arm rest. Somehow that felt a bit too humiliating. But the doctor was just looking at the laptop. Would he even notice?

What is so interesting in your stupid laptop anyway?

“Ooh, ahem, doc, please, this is quite frustrating, can you, uff, turn it up just a bit?” This time the doctor did look away from his screen. He had a strange look on his face, Isabella wasn’t sure if he was enjoying her frustration or what. He said: “Just hang in there a little bit more. The test is almost done.”

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That doesn’t help at all!

She wanted to scream. If this test finishes without her finishing, she would probably like to slap the stupid doctor. Probably it was good that she was restrained in a straitjacket. She tried to imagine sexy things. Some of the previous tests had been pretty good. She also imagined a hot bartender she had met a few months ago. Those medical bondage videos from last week were so good too. She had rubbed out a couple of big ones the night she found them.

Nothing is helping!

And then the vibrations stopped.

Change of equipment

Still feeling the frustration and trying to calm down, she noticed the doctor was still looking at her. Was he smiling a little bit there? What is so funny? He stood up and approached her saying: “Okay, we will need to change your probe and remove the stims.”

First he released the stimulators clamped on her nipples and unclipped them from the jacket. Then he knelt down in front of her again and took out the probe. Then he picked out a smaller probe from his case, lubed it up as well and said: “Now I need you to turn around, this one is going in your behind. But don’t worry, it is quite small and well lubed. Should also feel good. You are okay with butt insertions aren’t you?”

Isabella nodded, turned around, took a wider stance and then bent over. First the doctor smeared lube over her hole and then placed the head of the small probe on her entrance. Then slowly, carefully but insistently he pushed it inside her. Isabella let out a small moan as it passed her sphincter and settled into place.

Then without telling her to turn around, he added a larger probe to her front and again secured them with another strap. Finally he said: “Alright, stand up and face me. We have one more sensor. This one is for your mouth. Now you won’t be able to speak during this experiment. If something is wrong as in, anything hurts or if something scary is happening, just shake your head back and forth and make a kind of Uh oh noise. I will be looking at you during the entire experiment and if I see any sign of distress or if I see you do this signal, then I will interrupt the test, remove the sensor from your mouth and you will be able to tell me what is wrong. Is that okay?”

Isabella nodded. Doctor continued: “Please make the stop signal for me now so I know you understand it.” Isabella shook her head in a wide arc from side to side while humming the Uh oh noise. Doctor seemed satisfied and went on: “Very good, now is there anything you need or just want to tell me before we begin?” She replied: “No”

Sensor gag

He picked up a short tube of metal and black smooth silicone with straps coming out of it saying: “Now see these grooves. They are for your teeth. There is one on the top and another on the bottom. It is lined with smooth soft silicone so it should be quite comfortable when properly settled. Also here on the lower back end there is this large hollow. You will need to push your tongue all the way inside. It is going to form a vacuum seal around your tongue so you won’t find it easy to push the sensor around with your tongue. But don’t worry, it comes off easily if the straps are disengaged and I pull on the sensor from the outside. All this makes it quite form fitting for your mouth. This is the short variant so it shouldn’t trigger your gag reflex either. Does this all sound okay to you?”

Isabella was feeling a little bit intimidated, but she knew her gag reflex was not sensitive, so at least that part should be okay. She took a deep breath, put on a brave face and said: “I’m ready doc.” As he brought the sensor/gag up to her face, she opened her mouth wide.

He said: “Okay, first put your tongue to the entrance of the hollow. Yes, just like that. Okay now just push your tongue further as I push the sensor into your mouth. Very good. Now your teeth should be close to the correct position so gently close your jaw and once you feel your teeth sink into the grooves bite down gently. Very good. Now push your tongue all the way to the end. You should feel little metallic spots that may taste different from the surrounding silicone. You should also feel the air bubbles escaping by the sides of your tongue. Have you done it?” Isabella seemed to strain a bit, then relaxed and nodded. He went on: “Very good, now see how it pretty much stays in place even before I have connected the straps. But we should still secure it properly, like so. Now how is that, is the tightness good?” She nodded. “I does it feel comfortable?” She hummed: “Mhmm”

The doctor took a peek at the screen of his laptop and said: “Ah, sensor is showing good contact between your tongue and the leads at the end of the tongue compartment. It should be very difficult to pull your tongue out of the hollow now. Please try it and confirm.” Isabella made a face and strained again for a few seconds before relaxing and nodding again. “Also don’t worry, your tongue will come out quite easily once the sensor is being pulled out of your mouth, but while it is strapped in, your tongue will remain secured in it’s place.”

Then the doctor pulled a cable about half a centimeter thick from a socket high in the wall and attached it to the back of her jacket. He bent down and attached more cable to her ankle restraints while explaining: “These are for your safety. They prevent you from falling over. With that we are ready to begin. I will run another set with the stimulators. You don’t need to do anything this time around either.”

A more intense experiment

The doctor pressed some buttons on his laptop again and settled into his chair keeping watch over Isabella. The two probes inside her came to life first with vibrations and soon after she felt another sensation. It felt weird at first. She wasn’t sure if it was cold or hot or what. Then she felt her sphincter twitch a few times. It didn’t feel bad, just odd. She wanted to ask the doctor what was happening to her butt. The gag prevented any questions.

Then she realized that a low level electric current was running in her butt. It was not strong enough to be painful. Instead it heightened the sensations and felt like a mix of a buzz and a tickle. Isabella was so preoccupied with the mystery of the current, that the new wave of arousal took her by surprise.

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Again the evil probes held her on the edge not allowing her to climax. She tried bucking, flexing and fantasizing, but the intruders in her butt and mouth made even that difficult. They were just so damned distracting. All she could think about, was the electric current and the large thing holding her jaw open, teeth locked and even tongue trapped in place. No part of her mouth had much slack into any direction.

Isabella wanted to plead with the doctor to increase the intensity just a little bit. It would not take much to push her over the edge now. But she couldn’t even ask how long she would need to endure this horrible delicious frustration. If she gave the emergency signal, he would stop the test and that was the last thing she wanted. She would probably just have to endure even more soon after a moment of pause.

It had probably only been a few minutes, but to Isabella it felt like half an hour just teetering on the edge of orgasm being continually denied. It was a sweet agony. She couldn’t even moan properly. The strict gag allowed only a thin whine to escape her.

Then she felt the twitches in her butt become a bit stronger. Still it didn’t hurt. Somehow the immense arousal mixed with the new more powerful electric shocks and combined into a very powerful stimulation. Suddenly she felt herself sliding over the edge. The feeling was incredible. All sensations in her body turned into sexual pleasure.

In the middle of all this emotion and sensation, she felt another shock on her tongue this time. That too turned into sexual pleasure in the middle of this peak. Isabella lost all control of her muscles as a huge monster of an orgasm took her. It was boosted by the shocks in her butt and mouth. She would have screamed at the top of her lungs, if not for the gag in her mouth. She made another whine, this time much more powerful than the previous one.

She fell over, but the cables caught her so she was left hanging in the straitjacket and straps. Her muscles flexed uncontrollably for a while, until the electricity turned off and soon after the orgasm subsided.

Isabella was left a winded sweaty mess hanging from the cables. She swung back and forth for a while until she calmed down enough to try and regain her footing.

Another scan

The doctor helped her stand up and unbuckled the mouth sensor and said: “Now open up your jaw until both upper and lower front teeth are out of the grooves. Thats the upper teeth, let me see if I can wiggle it a bit to help get the lower teeth out. There, good, now I will start to pull it out, try to push your tongue into a thin long shape as I do it. That should allow air in through the sides.”

As he pulled, her tongue stretched with the gag initially, but then came a slow sucking sound and the tongue popped out of the hollow. Isabella stretched her jaw mouth a bit and then yawned saying: “That was probably the most intense gag I have ever worn. A pump up gag can get more painful, but this one felt more restrictive.” The doctor replied: “But it wasn’t painful or annoying I hope?” With a smile she said: “Oh no, not at all. I wish I had such a gag just to play with at home.”

Next the doctor began to unbuckle Isabella’s straitjacket and said: “That is all for this one. We will need to take another scan of you just as soon as I can get this off.” Soon after she stood in the yellow circle again and the scanner was circling and flashing as before.

Looking at the results, the doctor frowned with: “Seems you have two small new bruises on the left side of your lower ribs matching the structural strap the cable was connected to. I’ll make a note that it needs more padding for the next iteration.”

Isabella twisted around to look at her ribs, but couldn’t find anything. Must have been rather small. She was trying to feel them with her fingers while saying: “I can’t see anything. Wait, maybe, yes, ouch, that is probably one. I think it isn’t so bad. I get bruises on my wrists and ankles when I do a more spirited bondage session at home. Considering how spirited that last experiment got at the end, I’d say this straitjacket is very well padded already.”

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Part 2 will be posted later, probably some time next week.

Prompts for the images are in this comment.

Story is inspired by the AI generated images, but otherwise written by me without any additional input from other AI tools.

Since I had some trouble getting face swappers and other technical consistency tools to work on my AMD rig, I just added more details about the character into the prompt, included a name too and then generated many images and picked out the most consistent ones. The faces turned out okay, but I had no luck generating consistent straitjackets or straps.

My old stories inspired by other images