Not so serious.

A nonsense rhyme
Is so easy to write
Do it in the morning
Or do it at night
But whenever you do
You must use your toes
Or put a calligrapher’s pen
Up one side of the nose
The latter’s quite messy
Best done over a sink
And you’ll get your nose
All covered in ink
Which method do I use?
I bet you can guess
It’s the one that produces
Results that are best
Besides, with feet
I have a peculiar issue
Ah – ah choo!
I’ve sneezed ink!
Someone get me a tissue?

Write your own nonsense rhyme. It's fun.