A world where being non binary is the norm and people who are purely a girl or boy are looked down upon. Gender isn't assigned at birth and everyone has to choose what their gender is without having one assigned at birth. And no one knows what genitals the person in front of them has. And in the story I was thinking a common question for any couple with a child is "So which one of you got pregnant?" Even couples which if they we're cisgender would be considered heterosexual. Or a gay couple who adopted. What do you guys think?
Also their would be "Binaphobia" which would be the homophobia for people who can describe their gender as a binary