How many genders are there?

TWO=MEN AND WOMEN...SO SIMPLE....VIEW BIRTH CERTIFICATE FOR MORE INFO!

First, let's make sure we differentiate between sex (the form and function of the body) and gender (gender identity that's programmed into the brain).

We are all unique individuals, so you can say there are 7 billion different gender identities on Earth. Gender appears to exist on a spectrum; a sort of double Bell curve as seen here:

http://i147.photobucket.com/albums/r287/Igottherope/gendergraph.jpg

Most people identify with one of the two peaks on that graph (male or female), but not everyone. There is a small number of people who feel they are a mix of genders or don't feel like a gender at all.
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If I had a dollar for every gender that existed, I could buy one Powerball ticket.

Does it matter?

http://heatst.com/culture-wars/here-are-the-31-gender-identities-new-york-city-recognizes/

there are as many experiences of gender as there are people and as many gender categories as we care to define.

Only 2 genders.

There's male, female, and Trump.

male and female

Like, 8 1/2

Genetically speaking, there are two genders. Socially speaking? You tell me.