Casey, a high schooler who makes sec less binary.

Casey looked at the notebook in his hands and thought as he sat in a bathroom stall. He had gone on a bathroom break to get out of class and found the mysterious book. Flipping through the book he saw some writing detailing how the book worked and decided he’d rather investigate this than go back to class. There were also many pages of existing rules, describing the world.

“Hmm, the Rulebook says anything I write in here will change reality… I should probably make some changes for the good of the world.”

He started flipping through the pages crossing out a lines in the book, writing in new ones right underneath.

“Old Rule: humans are a largely peaceful species, while there may have been major conflicts in the past, humans have set aside their differences to make peace and are not interested in starting future conflicts.”

“Old Rule: humans have adapted over time and become highly resistant to diseases. Humans are all athletic and healthy, and suffer from no major conditions.”

He continued to rewrite rules until the world seemed like a utopia.

“Well, now that I’ve done some great changes for the world, I think I can indulge myself a little bit!”

Casey grinned as he flipped through the book to find the rules on human behavior and anatomy.

“Old rule: It is socially acceptable to have your genitals on display, or to be completely nude. Society does not have social norms against nudity, but clothing is still common for various protection reasons (for example some workplaces, hot or cold weather, etch. Clothing like shoes, socks, jackets, hats, etc are all largely the same, but other common clothing like shirts, pants, underwear, and dresses, are more revealing. It’s common to simply not wear underwear at all, and almost all everyday clothing is mostly for fashion and to display the body, rather than for protection. It’s common to have cutouts for breasts and cocks and other parts of the body for breathability.”

Casey looked down to see his own outfit. His shirt was largely the same, maybe a bit more loose, but his pants had changed dramatically. They were very comfortable and soft, but most noticeably, he had a massive hole around his crotch to display his lower bits to the world. He had an average sized cock, around 5 inches long when hard. Though he was never ashamed of his size, he was a little embarrassed by his flaccid dimensions, as he was definitely a grower and not a shower, being around 2.5 inches soft and smaller depending on the temperature. Right now he was around 2 inches, but he figured he could adjust his dimensions to his liking later and didn’t mind. He turned back to the notebook to keep writing rules and decided he would double his size after making the bigger changes.

“Old Rule: Sex is socially acceptable as a public behavior. While it is still seen as intimate behavior for a couple in a relationship, people are largely open to it even in public and it is seen as a regular activity among friend groups or even strangers.”

After much thought, he decided to add some extra rules to make the world more interesting.

“Old Rule: Humans are split into a wider range of sexes on a spectrum. Women can be normal or be a futanari. Cock size is highly variable and ranges from 3 inches to over 12 inches. In women cock size does not correlate with being more masculine or less feminine, but they are typically more socially outgoing and dominant. Most futanari are around 5 inches in length, with only 5% being on the high/low ends of the spectrum. Normal women typically have high sex drives and are socially submissive.”

“Men also have cock ranges from 3-12 inches. Men follow the same distribution as futanari do in terms of cock sizes and social dominance/behavior.”

Casey felt fairly satisfied with his results, but felt like there were some missing parts. He thought it was a bit unbalanced to have both normal women and futanari, while there were only men, so he decided to make another class of men.

“Old Rule: Some men are femboys and are much smaller in cock size. They look more feminine on average, and are largely indistinguishable from regular women. Their cock size is smaller than 3 inches, cum faster, and have longer refractory periods. They create semen more frequently and thus have a higher sex drive.”

“Old Rule: Normal women and femboys are largely submissive to other men and futanari. They often high high sex drives and require more attention. They have all the same rights and freedoms as regular humans, but because of their higher sex drive, it’s common for them to have masters and mistresses to help with their needs. It’s largely seen as a friendly relationship, though sometimes they develop further into more intimate ones, and there is no stigma on any relationships between different sexes.”