Ty had always felt it was very limiting that basically all humans were either born male or female, especially because of how hot he found people's drawings of boys with vaginas and girls with penises. And he knew there were a lot of people who weren't happy with the bodies they had, and wanted to change that.
His wish would change the world from having two common sexes people were born as to four. Instead of about a 50-50 chance of being born male or female, it was a 25-25 chance. One of the other 25% of the time, people would be born phemale- they would have mostly female traits, and their body would grow to look closer to female than male, but they had penises from birth. Generally, phemales used she/her as their pronouns. The last 25% of the time, people were born cemale- they looked mostly male, and grew to have more masculine bodies, but they had vaginas. Cemales mostly used he/him. Oh, and just to make things more fun, Ty added two caveats to his wish. One, he basically got rid of homophobia- it was normal for people to fuck and love whoever they liked. And two, he'd shuffle everyone's sexes with the wish.
As he made the wish, the world adjusted. Instead of about 3.9 billion male and 3.9 billion female humans, there would soon be 1.95 billion male, 1.95 billion female, 1.95 billion phemale and 1.95 billion cemale humans. People who'd had a strong affinity deep down for a certain sex would be transformed into that sex, but those who didn't (like Ty) would get randomized. All over the world, males were forming breasts and their bodies feminizing, having their penis and testicles recede inside them and a vaginal slit form, or both. Females were having their bodies firmed up and their breasts shrunk into their chests, their vaginal lips sealed up with balls being pushed inside them while their clits swelled into phalluses, or both.
And as for Ty...