Boise Ed sends this in: “Tantor is “a nervous, lovable elephant character from the Tarzan stories.” Why he would want to chew a tusk is a good question, but why the shrink is suddenly nervous is a bigger one.”
Similarly, Ian C asks: “Is this just a reference to biting his fingernails or is there an actual joke involved?”
Looking at this again, to get beyond the overall weirdness humor,
Look at the overall shape of the Doctor. From the tip of his pointy head down to the chair.
He has the curvature of an elephant’s tusk, or a banana, and he knows it,
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