Facial Hair Recognition
These restroom doors are similar but slightly different in their signs. They both have smiley faces, but one emphasizes mustache hair while the other highlights the hair on the eyelashes. The design team has emphasized these features to differentiate masculine from feminine, helping guests figure out which restroom to use.
While the signs might give a stereotypical view of what men and women look like, the message is still unambiguous. But considering how women can also have a peachy fuzz above their lip lines and many men sport long and luscious lashes, this concept seems somewhat dated and not inclusive.