Alex thought about how humans interact with gender. It was kind of boring how standardized everything was, almost every man had a dick and almost every woman had a pussy. Alex thought it might be fun if they were switched, but he didn't want just everyone to have the same thing.
He started adjusting the device, turning its settings to his liking. He tried to give everyone as many options as possible. He wanted to give people as many variations as he could.
He made it so that there were four equally commen varieties of genitals, a penis, a vagina, both and neither. And that the different genitals were distributed equally between men and women.
Alongside males and females there was also 20% of the population who was androgynous. These people also had an equal chance of any of the genitals.
Alex finalized his changes. Then he looked in his pants to see what he had...