My belief is that if you have the anatomy of a male, then you should use the male bathroom, and the other way too.
Srsly I don't get how someone with a penis can feel like it's okay to just waltz into a bathroom and say it's cus they feel that they are a woman. If you really feel that way, then change genders. Nobody but yourself is stopping you. Then you can go in as many girls bathrooms as you want without creeping anybody out