In the 21st century, it can sometimes be difficult to tell men and women apart. Of course, if you spend enough time with a person, you can discern their gender based on a variety of social cues. However, when it comes to toilets, it seems to me that the role of a sign maker should be to accentuate, celebrate, and make abundantly clear the differences between the male and female body, so that the reader knows exactly what is going on at first glance. The last thing any of us wants is an unwelcome intrusion of the opposite gender while we are doing our business.

The highly stylized man and woman icons shown above are apparently not clear enough for the occupants of building 40. In their typical can-do mindset, these physicists have taken matters into their own hands and added some explanatory signage.

This home-brew solution of adding signs and annotating existing ones, while effective, seems a bit overwrought. Where can we look for better answers? One shining example is to be found just outside the Main Auditorium, where the men’s room door demonstrates in no uncertain terms just which kind of human may enter, while simultaneously discouraging riff-raff from degrading the premises with anything less than a suit, bowtie and dress shoes.

Stick figures can also be identified by a more direct method of course: by drawing the genitalia. While we have not yet found it at CERN, this method is being used nearby in western Switzerland.

I would like to thank lovehurts for providing the last photograph. He took it while urinating … standing up.