I'm always amazed at how much knowledge a teenager can accumulate in so few years on this earth. My friend's 19-year-old brother, for example.ME: What are you listening to?19YO GENIUS (removes his iPod earplugs): The Who.ME: Great choice.19YO GENIUS: You know them?ME: The Who? Yes, I know them.19YO GENIUS: I love "Teenage Wasteland."ME: Oh yeah -- a classic. Love "Baba O'Riley."19YO GENIUS: Huh?
