Entering a toilet door marked with the signage commonly understood to be male (in trousers) and female (in a skirt), but not quite knowing whether it was the right choice can be embarrassing. Could the figure be a man in a skirt or a woman with trousers?
Cues on the other side of the door generally alert you to the mistake. But what if you no longer recognise the crude but often stylised stick figures or the gendered contents of a bathroom?