What's so binary about them, men don't have big boobs but their clitorisis are bigger than that of women and are used for a somewhat different ending function?
I 1st heard of this extended list of genders in 2016 or 17 which to date no one has defined past orientation or kink preferences . I'm sorry, demi-pan sexual is NOT a gender. Me preferring more voluptuous or rubenesque women is not a gender. These are preferences, not genders.
For decades already I've not even used the term "opposite sex," as there is nothing really opposite about them, just some minor differences that from, say a dog's POV are negligible. I would lean towards saying "the other sex," but then that sounds like these hoakey neu PC terms people have been coming up with since the 70s or so.
Perhaps instead of expending all this energy on irrelevant discussions about exagerrated differences that are largely imaginary, people should focus on their similarities, which albeit, isn't really all that great, given that people are truly the most awful creatures to have walked the earth.
Maybe that's why they focus on extra identities.