If you want to have insight into a completely different world, let your kid (or another kid) borrow your MP3 player.
My daughter's iPod was stolen at school. While we awaited her birthday money, she borrowed my mp3 player and put her own songs on it. That was fine. This morning I got it back and wanted to use it at the gym but decided I didn't have time to reprogram it.
Oh my goodness. I was laughing out loud. The first song was "I don't like your girlfriend" in which the singer is telling the boy all the things wrong with his current girlfriend so, of course, the singer can take her place. That song was on there TWICE!
Then there were a bunch of songs that were partially in English and partially Japanese. No, it's not language acquisition, she's just into anime so likes these cross-cultural songs.
I will say the beat on these songs is really high, so my heart rate was up. And the laughter did my soul some good too!
What a trip.