HOW THE WOMAN GOT HER PERIOD Contrary to popular belief, most mammals do not menstruate. In fact, it's a feature exclusive to the higher primates, certain bats, and elephant shrews (dogs undergo vaginal bleeding, but do not menstruate). What's more, modern women menstruate vastly more than any other animal. And it's bloody stupid (sorry). A shameful waste of nutrients, disabling, and a dead giveaway to any nearby predators. To understand why we do it, you must first understand that you have been lied to, throughout your life, about the most intimate relationship you will ever experience: the mother-fetus bond.













