There are nearly eight billion people on this planet; half of those are WOMEN who will, one day, menstruate. That personal experience will range from magical to terrifying, joyful to painful, embarrassing, or even hilarious. There are nearly eight billion people on this planet; half of those are WOMEN who will, one day, menstruate. That personal experience will range from magical to terrifying, joyful to painful, embarrassing, or even hilarious.