I was talking about a specific couple, with children, where the man identifies as non-binary, and the woman is heterosexual. Apart from his insistence of being

I was talking about a specific couple, with children, where the man identifies as non-binary, and the woman is heterosexual. Apart from his insistence of being addressed as they/them, he's behaviorally indistinguishable from an heterosexual man. To be fair, I understand that non-binary means they don't perceive themselves as exclusively male or female, but I doubt most people do. Sexuality, like most things, is not black and white, but a gradient of greys, so most people would be non-binary, hence the pronoun they/them isn't worth remarking.