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Misson to the ISS - The Astronaut with the Super Bladder

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I'd like to share a story that I started to write last summer, but I'd like to give some "context" before. At some point, I had googled some scientific literature about certain medical topics related to our fetish. I got particularly interested in so called "urodynamics" studies, where in some cases the peeing of healthy individuals was studied scientifically (including volume voided, flow rate etc.). A couple of days after I studied these things, I got my second Moderna shot. I did have some of the normal side effects, i.e. some temperature, headache and general dizziness for about 1.5 days. This, and my newly gained knowledge about "peeing science" made me think about a lot of crazy things.

Among others I started to ponder the question, if huge female bladders might cause problems during human space flight. I also started to think about the research required to investigate these topics. While looking through some of the data of these urodynamics studies, I learnt, that people that urinated with a powerful stream were classified as "super-voiders". When looking at their maximal pee rates, I thought that compared to "real super-voiders" (e.g. "HornyRoxy" from MDH or others), these rates were not yet in that range. I imagined what would happen if a "real super-voider" would participate in a urodynamics study in healty individuals and release her massive full bladder with maximum force into one of these standard urodynamics devices that are made for "normal" bladders. In my imagination, the pee would splash everywhere and spray the whole room with pee, as a consequence of the super hard stream hitting the device. In my imagination a really powerful stream or an excessive amount of urine might also break the device.

While having some temperature and lying dizzy but somewhat awake in my bed, I started to imagine a story about the world's leading research institute about high-pressure urodynamics, and how they were contacted by NASA to resolve issues involving the very large bladder of one of their female astronauts. I imagined a number of interesting scenarios that would take place in this research institute.

After taking some Paracetamol to counteract the side effects, I felt fit enough to sit in front of the computer to start writing about some of these ideas. I started to write about the activities at this research institute, but I soon noticed, that also the prequel, i.e. the story how NASA discovered that one of their female astronauts had a super large bladder, might be interesting.

So I started to write some completely unrealistic but hopefully fun story about what happened at Cape Canaveral. I first wrote the story without describing the look of the female astronauts, but added it later. For the main character of this first chapter (consisting of multiple parts), I thought about the hottest woman that I could imagine as an astronaut with a huge bladder, and came to the conclusion that for me the best choice would be the very attractive SpaceX engineer Jessie Anderson, that you may know from their coverage of SpaceX missions. However, I changed her name to Jessie Lewis (but you can imagine her as looking like Jessie Anderson).

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The Jessie Lewis situation - Part 1

Dr. Jessie Lewis (age 32)
Jessie made it through the NASA astronaut recruitment program. She is a mechanical engineer and was selected and trained for spacewalk missions to perform a number of difficult maintenance operations at the international space station. She is scheduled for her first trip to space in six months, a mission to the ISS for performing important maintenance procedures.
Already as a child she discovered that she could hold much more urine than anyone else. Nowadays, her close friends are aware of her peeing capabilities, and from time to time people mention her infinite bladder or recall the stories where Jessie released incredible amounts of pee in the stall next door or similar events. Jessie does enjoy the admiration that she gets for her super bladder, and in the right situation it makes her feel very happy and also horny when people notice that she can pee so much. She also enjoys to shock other people with her powerful and neverending pee stream. However, in her professional life, i.e. in her work at NASA, her bladder capacity was not yet discovered by anyone, not by the medical staff and not by her colleagues.
As explained before, she looks remarkably similar to SpaceX engineer Jessie Anderson.


Prof. Dr. MD. Julia Strahler (age 43)
Head of the Freiburg Institute for Space Urination Technology and High-Pressure Urodynamics in Germany.
Julia started her career as a medical doctor in urology. She soon gained some fame in the urology field when she started to characterize physiological properties of people with very large bladders and high pressure peeing capabilities. She discovered, that existing urodynamics equipment was not able to quantify the urination of so called "hyper-voiders". Julia herself belongs into the category of so called hyper-voiders (i.e. people that can void urine at a rate around 4 times higher than average people). She is known for her huge bladder and incredible bladder control, meaning that even when her bladder is filled to the max (at around 1.7 liters), she can in a highly controlled manner shoot out quick powerful pee streams and immediately regain control. She convincingly demonstrated the problems with existing urodynamics equipment by herself, by participating in urodynamics studies in healthy individuals and completely destroying the equipment with her laser-sharp pee stream.
She then got funding to develop a number of technologies to quantify the urination of hyper-voiders, but also to develop technologies to contain the urine expelled by hyper-voiders. In particular the urine containment systems were very successful, and as a consequence she contributed to essentially all human space flight programs with the development of high performance urine containment systems.

We will later introduce some of the members of her institute, as well as some of her colleagues working at NASA.


Jessie's crew:
Commander Samantha Dryer (age 43) Size 168cm, Samantha is multiethnic with roots in the Caribbean, and therefore has a darker skin color. She has shoulder-long brown hair, perfect body shape and is generally considered as very attractive.
Pilot James Morgan (age 41)
Mission specialist Jessie Lewis (age 32)
Mission specialist Nathalie Weber (age 35) Size 165cm, Nathalie is from Germany, rather short about chin-length blonde hair, quite prototypical for the attractive German woman. She is also generally considered as very attractive, and she has an extremely sporty body shape, definitively on the thinner end, super fit and zero body fat. She is also an engineer by training, and she is also part of the space walk team for maintenance work on the ISS, together with Jessie and Alexej.
Mission specialist Alexej Kolodin (age 46)
Mission specialist Chris Gardner (age 40)



Jessie was just sitting there in a room of the medical complex at Cape Canaveral. Six months ago she was selected for the mission and it was clear that she would finally go to space. These six months were rather busy, and all kinds of preparations and additional training was performed. Today, she participated in the so called "bladder morning", a routine procedure to check the size of the bladders of the astronauts. For this, the six members of the mission arrived there at 8 in the morning. Then, they had one hour available to drink 2.5 liters of an isotonic drink. After that, they should hold it as long as possible, and when they felt like they really could not hold it much longer, they were briefly examined by a physician via ultrasound and were then allowed to pee. Her colleagues had long left, the last one was her colleague Samantha Dryer, who managed to hold it for about one hour and twenty minutes after the initial hour. The NASA physician Dr. Andrea Hart entered the room to check for Jessie. 2 hours had passed now after the initial hour. The physician asked: "so you are still not bursting to go??", and Jessie replied: "I do feel some urge to go, but it is not really that I cannot hold it anymore at all". The physician said: "ok alright, let's examine your bladder with the ultrasound, this is quite amazing. Please follow me". Jessie followed Dr. Hart into an examination room. The rather petite and really slim Jessie exhibited a gigantic bulge in her abdominal region while following Dr. Hart

"Can you please sit down here.. then I'll take a look at your super bladder".

"Can you please pull up your sweater a little bit, such that we can take a look?"

Jessie pulled up her sweater, fully exposing her massive bulging bladder.

"Wow that's some serious bladder control you have there."

Dr. Hart used her ultrasound device to get some imaging from Jessie's bladder. After some time of examination, she said: "allright, very good, everything's fine with your super bladder!".

Jessie was of course happy to hear this, but also slightly suspicious if this check was done correctly. She asked: "so you don't think that my bladder might be too large? I only recently learned about the Strahler law, and from that point on I was wondering if my huge bladder might cause any problems for the mission?"

The "Strahler law" is an empirical observation about the rate at which kidneys produce urine in female astronauts under zero gravity. There is no explanation for why this is the case, but for some reason, the rate at which urine is produced in zero gravity is determined by the size of the bladder, following a quadratic relationship. Meaning, that the bladder of a female astronaut with a bladder of 1.2 liters was filling around 2.25 times faster than the bladder of a female astronaut with a bladder size of 0.8 liters. Prof. Strahler first hypothesized this law when working for the Russian Sojus program, where the urine containment system of one of the female astronauts failed. In subsequent studies performed on the space station ISS this law was confirmed, and despite the fact that nobody had an explanation for it, the law so far worked very reliably over all tested bladder sizes.

Dr. Hart replied: "ah yes, the Strahler law.. to be honest, two years ago we had problems with huge bladders in female astronauts. Your colleague Sophie Robinson has an incredibly huge bladder, and we had to adapt some of her space suit to deal with the amounts of urine produced. However, I can tell you that her bladder is still much bigger than yours, so we are really prepared for the amounts of urine you will produce in space".

Jessie was really glad to hear this, however she was also a bit skeptical about the statement that someone should have a bladder bigger than her. In her life so far she had never met anyone (male or female) who had a bladder of comparable size to her.

Jessie asked: "This is great to hear! So how to proceed, should I continue to wait until I really have to go?"

Dr. Hart: "No this is fine, we are done here. You can just use the restroom outside to empty your bladder."

Jessie: "Ok.. uhmm.. are you sure? Shouldn't we maybe measure how much urine I currently hold to ensure that there is really no problem?"

Dr. Hart: "Nah.. that's not necessary, don't worry about this, your bladder is huge but it is not in the range that we cannot deal with."

Jessie thanked the doctor, left the examination room, and headed for the restrooms in the facility. She entered a stall and started to pee. As always, her powerful pee stream created an incredily loud noise when hitting the water. She peed for about thirtyfive seconds with incredible force. She thought about Sophie Robinson's bladder and felt really confused about Dr. Hart's statement, that Sophie's bladder apparently was "much bigger" than hers. She also thought, how should it be possible that there is some space diaper that can handle this powerful stream and this amount of pee? But then she thought that there are a lot of smart people, and probably someone had figured out a solution to handle such vast amounts of urine.

As it turned out later, Dr. Hart was completely wrong about Jessie's bladder size. At the point of examination, Jessie was already holding slightly over 1.5 liters of pee in her bladder. The acclaimed super bladder of Sophie Robinson could only hold around 1.2 liters at the point of bursting. This problem became obvious in a later test.

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  • 2 weeks later...

This is absolutely brilliant.

Just the thought of an industry of urodynamics, where the sole purpose is to calculate the capacity & torrential flow rate of a lassie blessed with an absolutely massive, impossibly vast goddess bladder is enough to send me to the edge.

This is absolutely my kind of story, and a sincere thank you, HitEmAll, for taking the time to write and post. Perhaps we'll be lucky should the Moderna booster yields a similar glorious delirium of writing prowess.  

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Thanks for the kind words! Haha yes after this absurd idea about a research institute for high pressure urodynamics crossed my mind I immediately liked it a lot, and I had a lot of fun writing this stuff. The thing is, there is some draft for chapters three and four.  Jessie's situation as well as the story itself become kind of complicated. As a little teaser, we will get to know the NASA top engineers and scientists responsible for safe urination in space, and Jessie and her superbladder will prove to be a serious challenge for them. Right now I feel like I would like to continue writing this story. So I think that at some point in the  future I will post the next chapters. And yes, another "booster vaccination side effects writing delirium" would be great!

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