Limericks — never again

As I picked up the book this morning
Just as the day was dawning
I noticed a huge array of limericks —
there were well in excess of six.
So I determined there and then
"Limericks — never again."
Their form is too constricting
Not to say debilitating.
And so we must change the form of the text
and give the limericks a rest
lest boredom set in
and madness creep in
And we go about wearing nought but a vest.

Sorry, but...

There once was a beetroot called Muffin
Which was useful for virtually nuffin'
It was sixty years old
And oozing with mould
So they used it to make some tinned stuffin'.