Comment by ErroneousBosh

> The real challenge isn't writing one—any undergraduate can follow the AABBA scheme—it's understanding why meter and scansion matter beyond just counting syllables.

There was a young man from Japan

Whose poetry didn't quite scan

When told this was so

He said "Yes, I know..."

"... it's probably because I try to cram as many syllables into the last line as I possibly can!"

and also

There was a young man from Wick

Whose limericks were twisted and sick

It's best not to mention

How he broke convention

...