Your #1 fantasy, in one sentence.

[lucy]

BUT if I were caught in the men's bathroom then people would think it strange

That happened to the blues musician Marla Glen here not too long ago. But the other way round. She dressed as a men as she usually does and went into the ladies room at the main station and there was a big fuss and insults and maybe even some fists flying (it was never fully established what exaclty happened) and she finally was arrested by the police, but released after questioning.