So what would happen if suddenly, magically, men could menstruate and women could not? Clearly, menstruation would become an enviable, worthy, masculine event:                      Men would brag about how long and how much.                                                                     – Gloria Steinem – If Men Could Menstruate – Ms. Magazine, October, 1978

Imagine a world in which the men you know menstruate.  What would it be like?