When I´m in a public restroom and again I've been made aware of the fact that I have obviously entered the wrong room, I try to stay polite and respond by stating that not every female person has to follow society's rules when it comes to the alleged female dress-code.
I don´t quarrel with the fact that I am a butch. In fact, it's the opposite.
I consider the gender binary and the constraints coming with this "either... or" - system a prison. As far as I'm concerned, being able to live my life somewhere in between is a real privilege.