Once, a fool went to visit a friend.
The host served him food, which the fool found bland. Hearing the complaint, the host added a little salt to the dish.
After tasting the now-delicious food, the fool thought, "The food is tasty because of the salt. If a little salt makes it this good, a lot of salt must make it even better!" Being a fool, he began to eat nothing but salt. Far from tasting delicious, the salt ruined his appetite.