From the 4th book ("So Long, and Thanks for All the Fish "):
The sign said:
Hold stick near centre of its length. Moisten pointed end in mouth. Insert in tooth space, blunt end next to gum. Use gentle in-out motion.
"It seemed to me," said Wonko the Sane, "that any civilization that had so far lost its head as to need to include a set of detailed instructions for use in a packet of toothpicks, was no longer a civilization in which I could live and stay sane."
Anybody else feeling like this sometimes?