How many genders are there ?

LOL. Dude, I went to a website and it had this dropdown saying "What's your gender?", I clicked on it. AND Dude. There's a whole lot of genders, I was laughing for a good minute until I found Female. I swear to god, it had about 50 genders on the dropdown, It was extremely funny that I made a meme out of it. Ahem, anyway, there are two genders. Period. Gender - different from orientation.