Total Recall

Why is it that I have the short-term memory of a stunned goldfish, and yet I can recall all of lyrics to songs that I haven't heard for 10 years or more?

I was driving along yesterday and Big Time by Peter Gabriel came on the radio. I remember quite liking it when it came out (1986), but can't have heard it since then - and yet there I was singing along to it with clinical recall of the lyrics. Odd.

I did think maybe it was just my brain holding onto embarrassing song lyrics to deliberately annoy me, but perhaps the real explanation is that I just had terrible taste in music when I was younger. It's the only explanation for being able to sing along to Animal by Def Leppard as well...