A bad limerick

This morning I lay in bed fantasizing about having a mattress made out of sand. That way, I could dig a hole for my belly and lie on my stomach...

Here's my bad limerick that helped me not to grouch.

(Note: it rhymes better in American English...)

There are pros and cons to being fertile:
Trying to sleep is a definite hurdle
I toss and I turn
But my hip joints still burn
Oh for sand! I could burrow like a turtle.