An epitaph is a short piece of writing that honours the deceased, sometimes inscribed on the tombstone. A poetic epitaph is often a quatrain or couplet, and generally has a rhyme scheme of aabb or simply aa (for quatrains and couplets respectively); but as with most poetic forms, the rules are mutable. 

Song of the Sauna
A donkey, droll and debonair,
'Twas sweat and salt he craved;
He saw the sauna—did he dare?
By heat he was enslaved.

Fresh towel hung about his neck,
His fur and flesh laid bare,
He stroked himself, prepared to wreck—
Tight muzzles best beware.

With hot and heavy hands on him,
While passing through the halls,
He grabbed a wrist—just on a whim—
And lead it to the stalls.

Door open wide, big cat in tow,
That donkey took his seat;
A dozen patrons watched the show:
That cat worshipped his meat.

He closed his eyes and leaned right back,
Enjoying his tongue bath;
Soon others joined and licked his sack,
Mouths tracing their warpath.

That tiger took him to the hilt—
That was his claim to fame—
While fire inside the donkey built,
And down his throat he came.


Double lewd feature! Do remember, it's not the length that matters; it's how the tools are used.


Epitaph for Innocence
Innocence, my dear old friend, you've been dashed upon the rocks,
Used, abused, and used again, like the rear-end of a fox.
I'd like to say I'd wished you lived; in truth, you're better dead:
Now Robin Hood and Mother Goose are porn stars in our head.

-Charles Michael Averin