Humor

Whenever a person has wit, there's always a victim of this wit. He always makes fun of somebody, and it is always a human being. You don't say that a dog is funny or a horse is funny. No one will say that a rock or a river is funny. If you say that a table is funny, you make fun of the carpenter who made the table. Actually, humor is a criticism of human behavior.

from Conversations with Isaac Bashevis Singer