balance of the sexes in other communities of the world
this one is interesting. nat geo's taboo features various communities around the globe that recognizes many other genders/gender preferences aside from a man and a woman.
Around the world, customs differ, but almost every society shares one thing the concept of gender. Many believe that there are only two: man and woman. But in India, transgender men who cut off their genitals live as women and form a third gender. In Indonesia, hermaphrodite priests lead a society that recognizes five genders. And in rural Albania, women swap one gender for another to gain equality. Sometimes even the most conservative cultures must make room for those who challenge convention. But for many, embracing additional genders is still taboo.