Sorry, but as the dad of a very pretty teenage girl, I don't ask why a man is in the women's shower room. If he was doing something wrong, you think he's going to admit it to you or dream up some excuse? If he isn't an employee with a mop bucket and cleaning supplies, he has no business being there. Every dad of a small girl in the world has been in the position where he has to take her to the bathroom alone. You cover their eyes and take them to the men's room. That is normal protocol. Never does a man enter the lady's room.