If you have a penis you are a male, use the male bathrooms. If you have a vagina you are a female, use the female bathrooms. There are NO other sexes. Let's not bow down to those idiots.
If you don't like my opinion, that is ok, I probably wouldn't like yours either but I am allowing you to...
Half the time I do need to use it, it won't let me in, this is inspite of the fact that it accepts my details and then proceeds to tell me that the account belongs to someone else.