Someone up the thread asked about other verses of the song. I first heard it when I was about 13 (in 1964 and I saw a record of Rugby Songs for sale for about 13 shillings, and bought it to my parents' disgust.) Trying to remember other verses:

Oh I have a cousin Daniel
And he has a cocker spaniel
If you kick him in the middle
He will lift his leg and piddle

Oh I've got an Aunty Kitty
And she only had one titty
It was long and it was pointed
And the nipple's double-jointed

Now you know the Reverend Morgan
Well he had a funny organ
It was long and it was narrow
And he wheeled it in a barrow

Was you ever saw......etc

will add if/when I can remember