In one African country I talked to some female friends and it became clear that they had no idea what their monthly period was. All they knew was that they had it about once a month and nothing more. They sat there listening intently as I explained the formation of the egg, fertilization and preparation of the womb for the egg etc.
With the misogyny (mysophobia?) that wanders through the books of the Big Three religions of the West, is it any wonder basic functions get a miss?