And so it's great sometimes when I'm lying in bed
Just a-gettin' small pox in my head

The story:

This is one of those rare instances where I know the actual words the singer is saying, yet I still listen to it and say, "No, that doesn't sound like that. She's definitely saying 'small pox'!". Of course, the idea of her having it in her head is something my brother still teases me about today.