With the recent Bill Nye new netflix show gain some controversy, there's alot argument or comment on how "this is not science"
In a nutshell, people uses the scientific fact that SEX is determined by chromosome, This true when describe SEX. When describe gender however, thats different story. In the western world gender and sex is consider one same things, cause there's only two gender are recognize by society due to the bible. However as time progress, antrophological such Mead and Kaberry noticed that some isolated tribes have a different definition on gender. The best case for this is the bugis tribe in sulawesi where there are five gender (Graham Davies, Sharyn (2006). Challenging Gender Norms: Five Genders Among Bugis in Indonesia. Case Studies in Cultural Anthropology. Wadsworth Publishing. p. xi.). But this tradition are now consider tabu due to it's cotradicting teaching of Islam. This 'tradition' is not a new modern "trend", they have been existing way before the colonizing days.