A Topic

My kingdom for a topic;
I do not need a choice,
Just one to which I can attach
My daily rhyming voice.

Most subjects seek me out
Or fall, politely, in my lap
And others show as soon as I
Put on my thinking cap.

But once in a great while,
With my pencil in my hand,
I stare into my writing book,
No thoughts at my command.

And so I write a little poem
About my lack of theme,
The words cascading quickly
In a firm and steady stream.