RE: how many genders are there

there are two physical genders

Male and Female, that is because there are people with XY and XX chromosomes. You can literally distinguish the two, therefore there is a difference.

 

there are four sexual orientations, not to be confused with gender.

Asexual, Bisexual, Same-sex relation, heterosexual. Those are literally the only combinations.

 

anything else is made up and in a different category for how you “feel” about yourself. It has no actual meaning.