answer:Haha! I like this question. It reminds me of some of my stupid toilet memories. When I was young I never took much attention to the signs of the toilet in my school. I went to the rooms indiscriminately. The rooms for boys and girls were identical, which added to the confusion. Not until one day a boy said behind me: “Why is there a girl in this boy’s room?” did I begin to change. And more recently, I realized I had been going to the wrong room since I first entered university. There was actually no sign to distinguish the two rooms, and the men’s toilets were the only things to tell the two rooms apart. But I always thought that the room could be used by both men and women! I can only think of one acceptable circumstance for using the wrong toilet: when one toilet breaks down. Shortly after I made my university toilet discovery, the ladies room broke down. A big paper was hung on the door, which read: “Toilet currently unusable, please use the men room instead!”