Mark Twain knew about such things, that's how Huck Finn, despite wearing a dress, was instantly recognized as a boy. In Twain's story, as I recall, he was asked to throw something at a specific target. He did it correctly and hit the target, which all that an observant lady needed to check his story out. She knew that a girl would do it in an impossible way and miss by a mile.
I believe the give-away was that he clasped his legs together to catch something dropped in his lap instead of spreading his legs to make a net out of the dress. I was always doubtful of the realism, but I believe that's whats in the story.