The Windbags of My Mind

Like a circle in an oval
Like a rhombus in a square
It's a geometric lyric
And it's going God knows where
It is somewhat asymmetric
In a most peculiar way
And it stumbles and it bumbles
Without having much to say
The contraption keeps revolving
Till at last the gears fall out
And we're left to wonder
What the hell the song was all about