Untitled poem about a haircut.  But lofty, noble, tragic, timeless, 
full of love, treachery, retribution, quiet heroism in the face of 
certain doom.  Six lines, cleverly rhymed, and every word beginning 
with the letter s.

From <em>The Cyberiad</em>
By Stanislaw Lem (translated by Michael Kandel)

Seduced, shaggy Samson snored.
She scissored short. Sorely shorn,
Soon shackled slave, Samson sighed,
Silently scheming, 
Sightlessly seeking
Some savage, spectacular suicide.