There is not "only two genders" as people like to insist. That is an over simplification of something much more complicated than it is. Gender is at best a spectrum, where what defines gender can be looked at as endless series of combinations of masculine and feminine. I personally see these dichotomies dichotomies of masculine and feminine as arbitrary, which reinforce roles and stereotypes that society impose on people so they fit into a false dichotomy of assigned roles based on their genitalia, simply so people can feel more comfortable with familiarity. The concept of masculine and feminine are inherently based on a binary, genitalia based concept of gender, which I see a social fabrication. Maybe in the future the concept of gender will be eliminated.

It's been like this for for thousands of years. 

pp

It's been like this for for thousands of years.

and people have believed in gods for even longer