Once upon a time, before KF came into being, there was a little process called "development". In that process, there was big man known as Ramm-Jaeger behind it all, and he worked his little elves that he called "developers" to do this development with him. During development, Ramm-Jaeger and all the other little developers had to take many factors into consideration.
The most important factors were known as "time" and "money". When more "time" was consumed, Ramm had to give the developers "money". When this transfer happened, Killing Floor gained "content". Content was also known as things like guns, maps, sounds, music, zeds, and characters. They also had the option to create female characters as content, however, they would need to create more content for that content. Content such as expansive voice and animation sets, and this would have cost a lot of time and money. Because of this, Ramm and all the little developers were sad.
They knew that raging feminists would rage in the halls of the magical Tripwire Forum Palace if they did not create this extra content, but with the money and time that Ramm and the little developers had, creating this new content would have wasted their chance to create other content, such as guns, zeds, and maps, the most important parts of the magic that is Killing Floor.
So then Ramm and his little developers had an idea! They realised that a lot of those in their target audience would see that the magic of Killing Floor was in the part known as the core gameplay, which was found in the zeds, guns, and the maps, and not in the difference between those who had a hoo-hoo or a ha-ha.
Ramm and the little developer's idea was successful, and after Killing Floor was released, they found out that all the world's gamers were smart enough to enjoy the core gameplay and not the difference between those who have either hoo-hoos or ha-has. Neither the owners of the hoo-hoos or the ha-has even gave a poo-poo about the existence of this difference, and they continued to enjoy the magic of Killing Floor and its core gameplay.
Occasionally raging feminists would rage in the Tripwire Forum Palace's halls, yet its inhabitants who come from all walks of life could not possibly care less, as they knew that Ramm and his little developers were very generous folks who would make up for the absence of female characters by always adding more and more content to the core gameplay of Killing Floor, making it the most magical game in the all the land of Steam.
The End.
...Or is it?