The young lady, who was something of a food fadist, was on a visit to a
coast fishing village. She questioned her host as to the general diet of
the natives, and was told that they subsisted almost entirely on fish.
The girl protested:
"But fish is a brain food, and these folks are really the most
unintelligent-looking that I ever saw."
"Mebbe so," the host agreed. "And just think what they'd look like if
they didn't eat fish!"