I once got accused of singing "church songs all night" at an event...so we began to collect "blushers"! I have seen a few of them mentioned here, but here's another couple. Please note: since I learned all of the songs I know from having heard them performed informally, I have no idea who wrote them or the copyright status! I'd be happy to e-mail you lyrics to ones you can't find.

Ma, the Moose and Me (aka The Moose Song) [=I LIKE A MOOSE]
Merrilyn Meg
ROLL YOUR LEG OVER
several versions of Blow The Man Down

NO BALLS AT ALL

Come gather 'round laddies and listen to me
I'll tell you a tale that will fill you with glee
Of a pretty young maiden so fair and so tall
She married a man who had no balls at all

CHORUS:
No balls at all, no balls at all
She married a man who had no balls at all!

The night of her wedding she crept into bed
Her cheeks were so rosy, her arse was so red
She reached for his manhood, his manhood was small
She reached for his balls, but he'd no balls at all

CHORUS

"Mother dear mother now what shall I do?
I've married a man who's unable to screw.
My troubles are many, my pleasures are small
Fore I've married a man who has no balls at all!"

CHORUS

"Daughter dear daughter, now don't feel so bad;
The same it was true when I married your dad.
There's many a young lad who'll answer the call
Of a wife of a man who has no balls at all."

CHORUS

The very wise daughter took mother's advice,
And got herself laid by a man who seemed nice.
And a queer lookin' bastard was born in the fall
To the wife of a man who had no balls at all!

CHORUS

The father was happy, was high as a kite.
The sight of the baby filled him with delight.
'Though its head was too big and its body too small,
It had one thing in common...
NO BALLS AT ALL!

CHORUS