Salaam,
I am sure you know that I was only joking 
but I am curious to learn what the 3rd option is besides male and female
Shalom Aleikhem,
I wasnt joking, I am mad at you, let me call my local mullah party for back up. Be careful cause they are coming for you.

Well, the 3rd is for the ones that are not have either the complete/incomplete male only or complete/incomplete female only hardware. I hope that is enough for you to understand.
By the way, all these reminds me of my "Why hold Salat silently" thread on sunniforum. Some of them managed to avoid the topic and focus on my gender and make fun of it so I had to
reply:
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Shalom to all ignorant people,
Please be nice when you speak to a person. Human beings are not always male or female. Some can be transgender. Transgender have medical flaws, so only they can say if they are male or female inside. I am sure that not all sunnis are as uneducated and ill mannered discriminators as many of the ignorant people that are commenting on my gender. You claim to be the follower of a prophet who united the people , yet you just wait for a chance to discriminate. Now I know what it means in Qur'an 25:30. Some people can really give Islam a bad name. May God see it fit to guide you.
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Peace
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Student of Allah