Fog lyrics

There's a little child
Running round this house
And he never leaves
He will never leave
And the fog comes up from the sewers
And glows in the dark

Baby alligators in the sewers grow up fast
Grow up fast
Anything you want it can be done
How did you go bad?
Did you go bad?
Did you go bad?
Somethings will never wash away
Did you go bad?
Did you go bad?

Submitted by Guest

What do you think is the meaning of Fog by Radiohead?