Your gender may not be defined as male or female in every case. Some people may fall somewhere in between
Why so much concern over where they pee?
No. Your gender is either male (XX) or female (XY) with a very rare and exceptional genetic abnormality called gonadal mosaicism. While mosaicism occurs in about 1.7% of humans, most of the time a prevailing genitalia is clearly identifiable at birth. Only in 0.018% of cases is gender unidentifiable.
I don't care where people pee. I don't want grown men in the public restrooms of little girls. Most people who have ANY goddamn sense, DON'T! If you want to call me names for having common sense, so be it. I am an open minded person, I can accept people for who they are, warts and all, and I don't judge them whether they have a mental disorder or not. My concerns are not about transgenders, it's about protecting children from child molesters who will exploit this nonsense to victimize them. And yes, that's already happening.
In 99.992% of humans, you have an assigned gender at birth. That's the restroom you need to use until you've had your gender medically changed. Once you've done that, I have no problems with the restrooms you use. Until you've done that, I am going to err on the side of protecting the children.