4089 - Disturbed

I didn't get this pun at all. I had to look through the comments to find an explanation.

But once I found it I thought, oh yeah, I remember this head banging heavy metal song. You only have to listen to the first 30 seconds to get the pun. If you decide to listen to the whole thing, the last third of the song gets pretty x-rated. I don't think the radio played this version.