Limericks

At the end of the Babylon 5 pilot episode, Commander Sinclair and Ambassador Delenn are talking about the episode's events and the station itself. Sinclair mentions something about Tennyson, and Delenn inquires as follows:

Delenn: Poet?
Sinclair: Someone who writes poems. A story in meter or rhyme.
Delenn: [with a look of dawning comprehension] Ahh. "There once was a man from Nantucket."
Sinclair: [chuckles] You've been taking to Mister Garibaldi again.
Delenn: Yes. How did you know?

And thus the limerick is carried on to civilizations across the known galaxy.

Here are a few of my favorite limericks. Yes, they're all safe for work.

A young canner, exceedingly canny,
One morning remarked to his granny:
"A canner can can
Anything he can can,
But a canner can't can a can...can he?"

There was a young lady from Wight
Who traveled much faster than light.
She set out one day
In her relative way
And returned on the previous night.

A mosquito cried out in pain,
"A chemist has poisoned my brain!"
The cause of his sorrow
was para-Dichloro-
Diphenyl-Trichloroethane.
(Also known as DDT.)

And here are a couple of nontraditional (at least in form) limericks:

There was a young lady from Crewe
Whose limericks stopped at line two.

There was a young man from Verdun.

And finally, a Roman limerick:

A young Roman named Marcus Valenti
Had troubles and anguish aplenty.
He'd been beaten and plundered
By Huns by the C
Before he had even turned XX.