Note 30 — Chapter III · OCCASIONS AND CAUSES OF LAUGHTER.
Reading edition
Article on “Ticklishness” in the Dictionary of Psychological Medicine. He adds that ticklishness is not locally coincident with sensitiveness to pain. On the other hand, Dr. Charles Richet remarks that the parts most sensitive to tickling are the parts richest in tactile nerves. Article “Chatouillement,” Dictionnaire de Physiologie.