Actually the 'bridge' or middle bit is missing - it goes between 3rd and 4th verses, I think - it goes:
At night they look so cosy, those infant mafiosi, But lock the bedroom door I'm telling you, 'Cause when you get romantic, there's one sound that drives you frantic, And it's 'Hello, Mummy, Daddy, can we play horsey too?'
Just for the record ;-)) Best regards to all readers.