heiglandreas, 
Can anyone decently explain to me why people are so fixated on assigning a gender to someone?
Why is that important?
You wanna address them? "Hey [whatever the person told you they want to be called]"
You weren't told how to address them? "Excuse me: I'm Andreas, What's your name?"
They don't tell you? Have you considered that they probably don't want to talk to you?
