Not all men, obviously, but some men believe women can turn their period (menstruation) on and off. If this were true I'm sure overpopulation would never be an issue. How many women would turn it off and leave it that way. I think there is a great story in that. Like the first "man" to discover fire. The first man to tell a woman how she can turn off her period causes the gradual extinction of the human species. Probably best as a satire.