Some clever, person (probably a woman) has invented a "nice toy" that plugs into an iPod, and it vibrates to the music that is being played. Whether this is a genuine thing or not, it’s pretty damm clever. So next time you see a woman girating to her iPod, you know why. 🙂

If you are skeptical, take a look at NOTCOT – Oh. Mi. Bod. There is a lot more information on this site.