When I was very young, I vaugely remember this being occasionally sung on the radio (or the wireless as it was often referred to in those days) in the Sunday lunchtime "Billy Cotton Band Show" variety programme, which often had old "Music Hall" songs included. Obviously I did not understand any Double Entendres contained within it but just thought it funny - as one of the common Sunday lunch time deserts was just that - home made steamed Spotted Dick with either Golden Syrup or Bird's custard.