Oooh, ooh, I have a picture for this.
An article, by a feminist who was apparently raised by wolves.
free upload pictures
Some anecdata- to satisfy a requirement and push my own boundaries I took a gender studies course (that of course was uncleverly disguised as something slightly different). In the course of instruction we did a bathroom study and found that the male bathrooms (the school was built in the early 1900's and focused on engineering) were capable of supporting more users (urinals) than the female restrooms. The proposed "solution" was to make all the bathrooms single user so that everyone could experience lines for the bathrooms equally.