singing about the evil chickens

Like a lot of people, if I'm alone I'll absent-mindedly sing lyrics to songs I know. The other night, for example, I was waiting for the bus, and started singing "I Still Miss Someone." But for some reason I have a habit of replacing the lines with assertions about evil chickens ruling the world. So pretty soon I'm singing sopmething like

I never got over those blue eyes
And evil chickens rule the world

But gradually I start replacing more and more of the lines with the evil chicken references. Eventually, I'm just singing:

Evil, evil chickens
Evil chickens rule the world
Evil, evil chickens.
Evil chickens rule the world.

I hope nobody is listening.