Leeneia, I have often taught a parody of 'Grandfather's Clock' orally to primary school pupils aged 8/9 -- and within three repetitions of the first verse of 'My Grandfather's Socks' (written by James Curran, an immigrant from Ireland to Glasgow in the 1870s, and the man who was also responsible for 'Fitba Crazy'), they have pinned both tune and text fairly securely!

Just confirms for me that people like to sing a real tune with words that are pleasing to them -- because of the story, the emotion or even the joke!