They Might Be Giants Letterbox

I'll never know what you'll find when you open up your letterbox tomorrow
Cause a little bird never tells me anything I wanna know, she's my best friend, she's a sparrow
And I'll never know what you never never wanna know when you know what you are, oh

If I had a pair of eyes in the back of my head for each time
You forgot to take out all the things you forgot to talk about when you took a bite out of my spine
I would have a lot of eyes on the other side
Wouldn't I? Wouldn't that just be fine

I'll never know what you'll find when you open up your letterbox tomorrow
Cause a little bird never tells me anything I wanna know, she's my best friend, she's a sparrow
And I'll never know what you never never wanna know when you know what you are, oh