I agree that we all differ, in that some of us enjoy hearing the same gag, comic song (such as the Bantam Cock) or comedy sketch (the parrot sketch) over and over again, but others will not find something funny once they have heard it before and have already experienced the surprise ending. To my mind, comic songs have a limited shelf life, in that once everyone has heard it, you have to park it until later on when audiences might have changed or forgotten it and the ending.