You've probably seen this ad—they do it all the time—for menstrual pads. Not so long ago, a commercial for these products would have been unthinkable. In fact, I remember the first menstrual pad commercials very well. There was a girl, wrapped in a white towel, who approached her mother and said, enigmatically, happily, and determinedly: "Mom... Already..." In newspapers and novels, it hasn't been that long since it was talked about.