Er - if you think that "Jackie Boy" etc is about the upper class you have not been listening. It's about the joys of fornication. Quite surprised they let you listen to it at school. Certainly my wife vetoed teaching it to our daughter when at the age of 8 she first started singing in clubs. Later she also vetoed the Victorian music Hall Ballad "Puss Puss" on somewhat similar grounds, but that is another story.