How does one conquer fear, Don B.?
One takes a frog and sews it to one's shoe, he said.
The left or the right?
Don B. gave me a pitying look.
Well, you'd look mighty funny going down the street with only one frog sewed to your shoes, wouldn't you? he said. One frog on each shoe.

The Teachings of Don B.: A Yankee Way of Knowledge, pp. 7–8. - The Teachings of Don. B: Satires, Parodies, Fables, Illustrated Stories, and Plays of Donald Barthelme (1992)