Do your dreams have soundtracks?

The other day, a song came on the radio that I now find rather eerie, not because of the song itself, but because of its association. I told Jen that this song was the soundtrack to a nightmare I had. She was surprised to hear that my dreams had soundtracks. I guess I thought that was normal. I'd say a quarter of my dreams have soundtracks. Jen asked a few people, and it sounds like I might be unusual (as if that's a surprise).

Anyway, do your dreams have soundtracks? If so, how often?