Tampon ads are a big business. I mean, without them, would we understand the carefree-ness of white pants? Or the importance of feminine deodorizing? These ads have long been doling out advice. Like Kotex and their 1950s "Are you in the Know?" campaign, which offered gems like: “When at a restaurant, choose what appeals to you then give your order to your escort; he should pass it on to the waiter.” According to Harry Finley, curator of the Museum of Menstruation, ads started in the late 1800s and they’ve changed very little. “The companies (usually run by men) take advantage of the secrecy surrounding menstruation. They’ve always been about covering up any sign of menstruation, sight or odor. The worse women feel about menstruation the more vulnerable they are and companies make money from that.” With thanks to Finley, here are a collection of some of the weirder ads from all around the world throughout the years.