Does the chorus to Altered Images version of Happy Birthday niggle you?
If they were me, if they were me And I was you, and I was you If they were me, if they were me And I was you, and I was you If they were me and I was you Would you've liked a present too?
I am currently reading "The British Surrealists" by Desmond Morris, a delightfully biased and unreliable narrator on this subject. The 7 pages on Jennings are rather piquant