My daughter, who starts 4th grade this fall, told me that her camp bus driver routinely plays the radio during the ride, and that this song by female singer Katy Perry came on. She said that the kids her age all know this song, but started yelling at the bus driver to turn it off because it was "inappropriate" for the younger kids on the bus to hear. Yesterday, while driving with her in the car listening to her favorite radio station, the song came on and I heard it for the first time. The lyrics follow below, and you...