A highly intriguing photo from FailBlog:
Now, I'm sure there's a reasonable and boring explanation for whatever the heck that sign's supposed to mean.
But I'm more interested in the possibilities of what it could mean. If I were the editor of a fiction magazine, I would put up that photo and invite contributors to send in their tales of the society that produced it.
Why are non-gender children numerous enough to make the sign necessary? Why aren't there three sorts of public restrooms: Men, Women, and Null? Probably because the introduction of non-gender children in large numbers is a relatively new development. How will society adapt as the non-gender children grow and mature? In twenty years, will non-gender adults be common enough that every building will require a non-gender public restroom?