I remember these verses.

Now Mrs Brown had very small busoms
They hardly showed beneath her blouse
So they gave her medicinal compound
And now they milk her with the cows.

Now Master Brown had a very small Penis
He could hardly raise a stand
So they gave him medicinal compound
Now he comes in either hand.

Now Mr Brown had very small bollocks
They were just the size of peas
So they gave him medicinal compound
Now they hang below his knees.