Music Control

If you put an iPod Shuffle into your shirt pocket, you can position it quite easily so that the main button is over your left nipple (this may not work so well if your shirt has no pocket, it it has a pocket but on the right side or if you're a girl). You can then press the button and it feels like you're pressing on your nipple. And then you can convince yourself that it's your nipple that controls the music.

So if you go out without the iPod, it doesn't matter. If you want to listen to some music just press the nipple. And you'll hear some killer tunes.