Log one:
Created for biological warfare, the 'D' virus neutralists the male side of the targeted population, leaving any and all females ready to be captured, raped and bred by eager, productive company employees.
Originally developed as an uncontrollable aphrodisiac, the 'D' virus was supposed to cause the male side of the targeted population to be lost to need to have sex and ejaculate.
Supposing it worked, the 'D' virus' effects would be so potent that fucking and cumming would be all that infected males could think about. Invading forces would be able to enter unopposed, merely needing to step around and avoid the raping and mindless sex orgies in order to take control and secure key positions.
Update:
The 'D' virus was found to cause delightfully unexpected, rapid and unstable mutations in test subjects. Turning into what scientists could only describe as monsters, the test subjects were found having their sex organs massively grown, and moving to have sex with the other test subjects yet to undergo these changes. After watching them have sex, aroused male scientists analysed the results, and found the changed subjects' semen containing tiny, worm-like parasites.
These creatures were considered to be the very manifestation of the 'D' virus itself, and as a result the experiments have revealed countless, startling new possibilities no one could have predicted, and imagined enjoying.

Log two:
Deployed in an isolated or open water supply, the 'D' virus' worm-like parasite causes infested males to turn into monsters, intent on raping and ravaging other males with immensely over-sized, permanently erect fuck organs. They are completely, single-minded driven to fuck and ejaculate, endlessly and over and over again without rest.
Long before this process is complete, infected males begin to releasing spores with a very short lifespan into the air.
When inhaled by uninfected males, these spores rapidly cause cocks to at least double in size, and balls to quadruple in both size and productivity. Sensitivity as well, and the desire to masturbate becomes a deliciously intoxicating, almost all-consuming need.
Additionally, spore-infected males being to leak sperm constantly, and as a result, are in a state of being perpetually close to orgasm. In this state, a thrust into a warm wet hole or a single stroke, tug, kiss or caress may be all that's needed for a ball-draining orgasm that ends in mouthfuls of freshly ejaculated semen.
All of this leaked and ejaculated semen has to be found to contain pheromones that attract infected males, so spore-infected males must futilely attempt to prevent cumming, or they'll be found, and raped.
It should be noted that spore-infected males attempting to abstain from ejaculating for even an hour begin to piss their cum at a constant rate, and their balls become swollen with entire liters of thick, gooey cum.

Log three:
Among test cases and preliminary trails on remote villages a sharp divide has been noticed in further mutations that the spores induce.
The most important, and celebrated of these, is that approximately 75% of males exposed to the spores being to undergo full body transformations and hormonal changes. These changes may be best described as feminisation, however shemalefication may be even more accurate.
The first step in the shemale transformation process is also the most noticeable, as the helpless males find themselves growing large, pendulous, leaking breasts and attractive, incredibly feminine bodies. Their assholes become vastly more sensitive, with greatly enlarged prostate glands protruding deep into the anal passage. Any kind of fucking milks the prostate gland so profoundly that test subjects having sex are unable to stop having multiple orgasms and ejaculations that completely drain their enormous balls.
Update:
While getting fucked, all fully transformed shemale test subjects were observed lactating. Initially dismissed, further study surprisingly revealed that no breast milk was present. To the delight of the company and many scientists the breasts of all shemale test subjects have been found to be in fact producing very thick, fully functional semen. This change is seemingly for the benefit of newly born 'D' virus parasites, who treat cm like a source of nutrition and are always hungry.

Log four:
As previously noted, the semen produced by males exposed to 'D' virus spores will attract any and all nearby infected males. Due to this process, newly transformed shemales are never able to avoid discovery, and are ravaged, and impregnated without fail.
Unfamiliar with their new bodies, greatly reduced physical strength, and always on the verge of cumming from the stimulation of their own clothing, shemale test subjects were rarely able to run far before collapsing in orgasm. They were also unable to offer any significant resistance after seeing the bloated, sperm-dripping cock-head of infected males, as their bodies instinctively "flared with the desire to be impreganted and bred."
In both lab and preliminary village trials, newly transformed shemales with automatic weapons were observed being disarmed and mounted with delightful ease and little to no resistance. They were then rapidly mated with, and repeatedly impregnated by the worm infested cum that infected males ejaculated.
After approximately three hours, impregnated test subjects would then give birth to dozens of fully grown 'D' virus parasites. The act of birthing appeared to be so pleasurable that the shemale mothers would orgasm and ejaculated almost endlessly. After being born, the newborn parasites would then attack their mother, and force her to ejaculate even more frequently and intensely. The sperm that spore-infected shemales produce seem to be the primary source of nutrition for 'D' virus parasites, as offspring grew very quickly when ingesting or being splattered in cum.

Log five:
While approximately 75% of men exposed to 'D' virus spores became attractive shemale breeding sluts, the remaining 25% seemed to be partially immune. Instead of developing shemale traits, males simply experienced even greater growth in the size and productivity of their already enlarged fuck organs.
Perhaps understandably, in contrast to their physical improvements, stud males quickly lost their capacity for making rational decisions and coherent trains of though. As cocks became bigger, the only thing test subjects could thing about was the need to fuck. and to cum.
However, the belief that these test subjects would go about mass-impregnating the female population turned out to be wrong. Instead of preying on women, the stud males were preyed upon, and gang-raped by the 'D" virus parasites themselves. Delighted, aroused and horrified, scientists observed stud males being swarmed by parasites, their mouths, cocks, assholes equally and frantically deeply fucked. The huge amounts of thick gooey cum test subjects pumped out in thick ropes were ideal for sustaining entire nests of 'D' virus parasites.
It should be noted that these stud males can copulate with females, but in the presence of 'D' virus parasites, this urge is non-existent.
Under prolonged exposure and other stimuli, these stud males appear to have no limit to how big they could grow. Test subject #Midi, currently holding the record, has a flaccid cock and balls so big they touch the floor.

Log six:
On the subject of females, it should be noted that while they can be used for breeding, it is typically avoided. As women cannot produce the hot, gooey, sticky cum that 'D' virus parasites love to eat, breeding becomes highly inefficient. Additionally, infected males are inherently drawn to spore-infested shemales and shemales tend to be quickly found and mounted. |Stud males on the other hand, rarely get a chance before 'D' virus parasites find them and their constantly sperm-leaking, over-sized cocks. As a result, copulation  and breeding with females rarely takes place.
However, this is not to say that females are left entirely alone. To the company's delight, the 'D' virus spores have been observed inducing several very productive effects on female test subjects, in both lab conditions and preliminary trails on remote villages.
Firstly, 'D' virus spores were observed immediately rendering any exposed female unconscious. Lasting up to twenty four hours in the bloodstream, an unconscious female population allowed infected males to very single-minded pursue mounting, fucking and cumming deep inside the assholes and throats of other males.
Furthermore, with proper protection company employees could go about impregnating the female population without resistance.
Additionally, even before the company started issuing employees 'enhancements' of their own, video based documentation showed the targeted female population being impregnated with highly unexpected ease.

Log seven:
while some shemales eventually turn into infected males themselves, the population is kept roughly in balance so that newborn parasites are assured a steady supply of cum, since stud males produce far more cum, they rarely ever become fully infected.
It should be noted that over 15 distinct variation of the 'D' virus parasites have been observed so far. The original worm-like parasite now only exists in test tubes, as numerous superior strains have developed and adapted for different environments.
The current mainstream form of parasite has multiple tentacles and can change its shape to fit through small gaps as it searches for males to infect. The tentacles contain needles that can inject concentrated spore-venom into targets, facilitating the change into shemales or stud males without 'D' virus spores or infected males present.
Given time, some parasites grow so large that they require the constant supply of cum from multiple males. They form tightly enclosed nests, and keep every cum-spewing dick to themselves. Know as Brood Mothers, these parasites are very difficult to find, and if they aren't caught, can easily re-infest previously cleared areas.
Other species have the developed their own distinctive forms and abilities, such as spore glands, very pleasure mouth-orifices, or hypnotic scents that attract uninfected males. One much loved variant has long cock-like tentacles, and it mercilessly ejaculates its easily absorbed venom deep into male asses.

Long eight:
While recreative research(sex) using test subjects is allowed at all times, for improved and more pleasurable impregnating all employees are put through inoculations and fertility treatments, It is a moral requirement that each employee has his assets built up in order to potentially breed an endless parade of unconscious sluts.
The inoculation renders employees immune to the shemalizing and mind-corrosive effects of the 'D' virus, as well as protecting them from being seen as viable breeding target.
Their cocks and balls are then exposed to 'D' virus spores in a controlled glory-hole-style environment, and allowed to be gradually infected. While some employees enjoy the constant orgasmic ecstasy 'D' virus spores are famous for inducing, most true pleasure seekers volunteer for exposing their cocks to the parasites themselves. The direct injection of concentrated spore venom into sex organ leads to incredibly explosive, mind-blowing, excruciatingly painful and pleasurable ball draining orgasms. It often becomes difficult to extract employees from these conditions as they continue violently thrusting against the glory-hole, shooting more and more hot sticky cum as their cocks grow large and fat.
After cooling down, employees are eventually given plenty of time to enjoy their enlarged constantly cumming assets. Naturally the massive augmentation of their fuck organs does not leave their minds completely untouched, as the onrush of hormones and overcharged never signals leaves the desire to fuck even more deeply lodged in their minds.

Log nine:
While the standard 'D' virus inoculation protects from shemaleification and ravaging by infected males, partial inoculation without shemalefication protection is also available.
In fact, it is not just available, but openly encouraged, and is required for highly valued and coveted positions as secretaries and medical counselors. Filling these positions means being filled with the hard throbbing cocks of other employees, as well as countless load of very thick, smelly cum whether it's day or night. Having to serve higher ranking bosses in particular, they are trained to satisfy every want and desire, any time they demand it. Only the most craven whores would ever take these jobs, as they are often considered to be surrendering their raping dominance for the role of just another worthless slut.
It should also be noted that shemale medical counselors spend a great deal of time trying to rehabilitate spore-infected stud males. As they almost always make ideal recruits for the company and fir right in with other males, the counselors use every asset they have to fuck them back into lucid thinking. This process often encourages stud males to impregnate helpless female test subjects, and is often sticky, hard, ultimately rewarding, and very pleasurable. Each stud male creates several daughters in the process.
To date, more than 60% of selected stud males have been successfully humanized with many more suspected of faking so they continue enjoying more sex with shemale counselors and female test subjects.

Log ten:
As previously mentioned, newer generations of 'D' virus parasites have been discovered with adaptations that are highly efficient for surviving in new and unusual environments and circumstances, as well as even greater acapabilities when forcing male victims to squeal with pleasure and ejaculate their cum filled testicles to ecstatic emptiness.
Furthermore, newer generations of parasites were found releasing pheromones that lured and controlled the older generations. A pack-like mentality has been observed developing on multiple occasions with the strongest, most productive new parasites acting as leaders.
The moment these discoveries were made, many employees eagerly volunteered for exposing their already massively enlarged, constantly cumming dicks to the newer generations of 'D' virus parasites. As a result, every employee that enjoyed multiple treatments developed cocks, ball-sacks, sperm and gooey cock-milk production rated hundreds of times beyond the normal human average.
These 'evolved' males also became immune to older generations of spores, and were found to be considered already infected by infected males. Employees reported being able to act naked without any form of protection or clothing in close proximity to infected males.
Further abilities have yet to be discovered, and in the meantime the company encourages employees to undergo more and more exposure treatments, to have enormous cocks so productive that owners need to fuck and masturbate constantly every day.

Log eleven:
On the subject of impregnating, every male employee has been recorded with highly above average, almost ridiculous levels of sperm productions and quality. Impregnation of female test subjects in and both lab and open filed conditions have been incredibly efficient, and almost overwhelmingly pleasurable.
Many employees have also reported an insatiable desire to keep breeding and filling unconscious sluts to the brim with cum. Naturally, the company is delighted to hear such reports, and gives open permission for employees to enjoy all the recreational research that their incredibly large, swollen, engorged-with-sperm balls can handle.
Furthermore, similar sexual desires and levels of productivity and breeding efficiency has been observed in stud males as well.
With the above-expected performance of enhanced employees, and the successful rehabilitation of some many spore-infected stud males, mass-impregnation of females in targeted population has been deemed as incredibly viable. With the ease at which the 'D' virus has pacified population so far, the approval for even more trails and breeding operations on the populations of remote villages has been given.
By doing this, the amount of breeding sluts in containment, and the evolution of the 'D' virus, can be greatly and quickly increased. Additionally, as a much desired bonus more slut will be available for recreational research, and employees will have little need to compete for fresh holes to fuck.

Log twelve:
So far, all impregnated sluts have been found carrying babies that appear delightfully altered due to the corruptive effects of the 'D' virus, 22% of unwillingly impregnated sluts have already gone through childbirth at least once, and the gestation period from impregnation to birth has lasted approximately two months, 90% of sluts gave birth to barely-looking-human, rapidly growing monsters within this time frame.
Through examinations on already born hybrid monsters offspring, and ultrasounds on sluts still carrying their babies, company scientists confirmed the existence of mutated, distinctly non-human limbs, fully functional appendages, and many abnormally shaped growths and organs. 15% of hybrids also been observed with multiple cocks and testicles.
To the company's delight, all male hybrids to date have deliciously over-sized and fully functional sex organs - the same as infected males, enhanced males and stud males. Even before birth, all 'D' virus infected male offspring were recorded having flaccid penises bigger than average, fully grown, erect adult human male.
The purest, most unevolved, original worm-like form of the 'D' virus parasite has been discovered churning in the thick gooey cum and swollen, engorged balls of all hybrid males.
Sadly, information on hybrid females remain top secret and classified. However, rumors suggest that fully adult hybrid sluts may already exist, and may be squeezing the cum out of the balls of higher ranked employees.

Log thirteen, case A:
Third preliminary trial on a remote village, conducted previously untouched area G34, population 1436. During frenzied open mass-impregnating of the female population company employee #193, now knows as kelly, was observed ejaculating deep into the pussy of an unconscious slut when her gas-mask broke. She was accidentally exposed to 'D' virus spores as a result and quickly turned into a gorgeous shemale.
While many employees did attempt to help, no one was able to get close enough to deliver an emergency inoculation before she was completely surrounded by infected males. Employees could then only watch as Kelly was mounted, deeply penetrated and mercilessly gang banged by dozens of infected males. Safe extraction could only be performed 24 hours later, after she had given birth to more than 600 parasites, and was found splatters with semen.
Upon returning to company facilities, examiners deemed kelly to be an insatiable, cock-hungry cum-slut, with a mind seemingly completely devoted to making other males scream with pleasure. Additionally, her new body also seemed to be profoundly designed for carrying out this very act.
While some employees were initially upset over kelly's transformation, even more came to regard her transformation as quite the blessing. Initial attempts for rehabilitation very quickly turned into session after session of passionate, delighted anal pounding.
In the coming months, almost all employees were recorded crushing kelly's enlarged prostate with their huge, hard, throbbing cocks. Her wild, sticky ejaculations with each and every thrust up her made to get fucked asshole would squeeze the men fucking her dry in a matter of seconds. She would moan, pant and stupidly beg for more cock.
While not getting fucked, shemale test subject, former employee kelly was observed masturbating and using any object possible to milk every last drop of very thick cum from the depths of her enlarged, highly over-productive balls. A machine using for milking huge cocks of male test subjects dry was plated in her room, and extreme difficulty was reported in attempting to remove her once she started pumping away into the cock-milking orifice. Even when supplied with liquids, kelly would often pound away percileslly at the cock-sleeve, thrusting and cumming until she would eventually pass out from exhaustion.
It should be noted, that only a fraction of shemales turn into brain-dead cumsluts. Despite having a near overwhelming sex drive the vast majority of shemales remain mentally intact, at least before breeding.