These are all adaptations from John Valby... AKA, Dr. Dirty's "Ya Ya".

There once was a girl from Irac
Who had holes down the length of her cock.
When she got an erection,
She would play a selection,
From Johan Sebastian Bach.

Ey ya, ya ya,
Your mother goes down for Egyptians.
So sing me another verse,
Worse then the other verse,
Then pull me around by my willy.

There once was a girl of sort,
Who dated a man who was short.
He got naked in the bed,
She showed him her's, pointed and said,
"Mine is a prick, that's a wort."

Ey Yea, yea yea,
Your Brother fucks butterball turkeys.
So sing me another verse
Worse then the other verse,
Then pull me around by my willy.

There once was a girl named Jan.
Who had three feet of cock in her hand.
She said to her tart,
How's this for a start?
My balls are still out in the van.

Ey ya, ya ya
Your sister gave a rash to the donkey.
So sing me another verse,
Worse then the other verse,
Then pull me aound by my willy.

There once was a girl from Bombay,
Who molded a cunt out of clay.
The heat of her prick,
Turned that clay into brick,
And chaffed all her foreskin away.

Ey ya, ya ya
Your sister needed a twat fence to keep out the Mexicans.
So sing me another verse,
Worse then the other verse,
Then pull me around by my willy.

Do you want to hear the dirty ones now? *listens for cheers*

There once was a whore named Morene,
Who's cock wasn't kept very clean.
The semen driped out,
Of her smelly old spout,
Which she scraped up and ate with salteens.

Ey ya, ya ya,
Disco freaks suck mirror balls.
So sing me another verse,
Worse then the other verse,
then pull me around by my willy.

There once was a woman named Dot.
Who inserted a fly in her cock.
When you'd tickle her nutz
That fucker would buzz,
Till she glued his wings tight with a shot.

Ey yea, yea yea,
If you like that, you're a sick mother fucker.
Now sing me another verse,
Worse then the other verse,
Then dance on my balls till I'm silly.