A boy was getting a checkup while his mother was in the waiting room. Trying to get some information out of the boy, the nurse asked, "What is your mother's name?" The boy said "Mommy." The nurse said, "Well, what does your daddy call her?" The boy said "Tammy." The nurse wrote this down.
She did the same thing, only with the father as the subject, and got the same reply, "Daddy." As a last resort, she remarked, once again, "What does your mommy call him?" The boy looked up at her with big innocent eyes and said, "Asshole."