Since we have a version from the USA, England, and Australia, here is a version of this song from Scotland. Specifically below is a variant from the Edinburgh University Hockey Club.

WEE WILLY WANKY

There once was a lassy with a broad hairy assy,
Singing na, na, na-na-na,
Na, na, na, na, na-na-na,
Na, na, na, na, na-na-na,
Na, na, na-na, na-na.

Then there's the jockey with the upstanding cocky,
Who's shagging the lassy with the broad hairy assy,
Singing na, na, na-na-na!

Wee Willy Wanky, he was wanking in his hanky
At the sight of the jockey with the upstanding cocky,
Who was shagging the lassy with the broad hairy assy,
Singing na, na, na-na-na!

Rover the hound was chewing at the mound
Of wee Willy Wanky, who was wanking in his hanky
At the sight of the jockey with the upstanding cocky
Who was shagging the lassy with the broad hairy assy,
Singing na, na, na-na-na!

Then there was Tracy, who was sitting on the facey,
Of Rover the hound, who was chewing at the mound
Of wee Willy Wanky, who was wanking in his hanky
At the sight of the jockey, with the upstanding cocky,
Who was shagging the lassy with the broad hairy assy,
Singing na, na, na-na-na!

Then there was Roger, who was sticking his todger,
In the ear of the Tracy, who was sitting on the facey
Of Rover the hound, who was chewing on the mound
Of wee Willy Wanky, who was wanking in his hanky
At the sight of the jockey with the upstanding cocky,
Who was shagging the lassy with the broad hairy assy,
Singing na, na, na-na-na!

The heavenly maiden, who was heavenly laden,
She was tossing off Roger who was sticking his todger,
In the ear of the Tracy, who was sitting on the facey,
Of Rover the hound who was chewing at the mound
Of wee Willy Wanky, who was wanking in his hanky
At the sight of the jockey with the upstanding cocky,
Who was shagging the lassy with the broad hairy assy,
Singing na, na, na-na-na!

The monk with the erection, was giving clitoral inspection
To the heavenly maiden, who was heavenly laden,
She was tossing off Roger, who was sticking his todger,
In the ear of the Tracy who was sitting on the facey
Of Rover the hound, who chewing at the mound
Of wee Willy Wanky, who was wanking in his hanky
At the sight of the jockey with the upstanding cocky,
Who was shagging the lassy with the broad hairy assy,
Singing na, na, na-na-na!

The vicar in his spectacles was tickling the testicles,
Of the monk with the erection giving clitoral inspection,
To the heavenly maiden, who was heavenly laden,
Who was tossing off Roger, who was sticking his todger
In the ear, of the Tracy, who was sitting on the facey,
Of Rover the hound who was chewing at the mound
Of wee Willy Wanky, who was wanking in his hanky
At the sight of the jockey with the upstanding cocky,
Who was shagging the lassy with the broad hairy assy.
Singing na, na, na-na-na!

Cardinal Joff was cracking one off
At the vicar in his spectacles, who was tickling the testicles
Of the monk with the erection giving clitoral inspection,
To the heavenly maiden, who was heavenly laden,
Who was tossing off Roger, who was sticking his todger
In the ear of the Tracy, who was sitting on the facey,
Of Rover the hound, who was chewing at the mound,
Of wee Willy Wanky, who was wanking in his hanky
At the sight of the jockey with the upstanding cocky,
Who was shagging the lassy with the broad hairy assy,
Singing na, na, na-na-na!