From David B in Derbyshire, England:
On the grounds that the old uns are the good uns I don't usually question the age of old jokes. But your Dr Spock's third ear - the final front ear - took me back to 1955 The film Davy Crockett was all the rage (I had a coonskin hat with a tail and my popgun was carved with Brown Bess on the stock). And the playground joke was that he had three ears, left ear, right ear and wild front ear.
Here is a pic of David as he was back in 1955. . .
No, that’s not true, it’s Darby Hinton who played Israel Boone, Daniel Boone’s son, in the 1964-1970 Fess parker TV series.
Siome mor Spock items . . ,.