A man walked into a doctor's examining1 room.
"Put out your tongue2," the doctor said3.
The man put out his tongue and the doctor said.
"O.K. You can put your tongue back now. " the doctor said. "It's clear4 what's wrong with you. You need more exercise."
"But, doctor," the man said. "I don't think--"
"Don't tell I me what you think, " the doctor said "I am the doctor, not you. I know what you need. I see hundreds of people like you. None5 of them get any exercise. They sit in offices all day and in front of the television6 in the evening. What you need is to walk quickly for at least7 20 minutes a day."
"Doctor, you don't understand," the patient8 said "I -- "
"I don't want to hear any excuses," the doctor said. "You must find time for exercise. If you don't, you will get fat and have health9 problems10 when you are older."
"But I walk every day," the patient said.
"Oh, yes, and I know what kind of walking that is. You walk a few11 feet to the train station from your house, a few more feet from the station to your office, and a few more feet from your office to a restaurant for lunch and back. That's not real12 walking. I'm talking about a walk in the park for twenty minutes every day. "
"Please listen to me, doctor!" the patient shouted, getting angry with this doctor who thought13 he knew everything.
"I'm a mailman," the patient went on, "and I walk for seven hours every day."
For a moment the doctor was14 silent15, then he said quietly16, "Put your tongue out again, will you?"