The Perfect Son.
A: I have the perfect son.
B: Does he smoke?
A: No, he doesn't.
B: Does he drink whiskey?
A: No, he doesn't.
B: Does he ever come home late?
A: No, he doesn't.
B: I guess you really do have the perfect son. How old is he?
A: He will be six months old next Wednesday.

A family of mice were surprised by a big cat. Father Mouse jumped and and said, "Bow-wow!" The cat ran away. "What was that, Father?" asked Baby Mouse. "Well, son, that's why it's important to learn a second language.

My friend said he knew a man with a wooden leg named Smith.
So I asked him "What was the name of his other leg?"

(Try this one with your students the next time you are teaching a lesson that includes this type of grammer.)

The doctor to the patient: 'You are very sick'
The patient to the doctor: 'Can I get a second opinion?'
The doctor again: 'Yes, you are very ugly too...'

I use this joke for retelling in reported speech.
 

A man goes to the doctor and says, "Doctor, wherever I touch, it hurts."
The doctor asks, "What do you mean?"
The man says, "When I touch my shoulder, it really hurts. If I touch my knee - OUCH! When I touch my forehead, it really, really hurts."
The doctor says, "I know what's wrong with you - you've broken your finger!"
 

Patient: Doctor, I have a pain in my eye whenever I drink tea.
Doctor: Take the spoon out of the mug before you drink.
 

Patient: Doctor! You've got to help me! Nobody ever listens to me. No one ever pays any attention to what I have to say.

Doctor: Next please.
 

Two boys were arguing when the teacher entered the room.

The teacher says, "Why are you arguing?"

One boy answers, "We found a ten dollor bill and decided to give it to whoever tells the biggest lie."

"You should be ashamed of yourselves," said the teacher, "When I was your age I didn't even know what a lie was."

The boys gave the ten dollars to the teacher.

A: Just look at that young person with the short hair and blue jeans. Is it a boy or a girl?
B: It's a girl. She's my daughter.
A: Oh, I'm sorry, sir. I didn't know that you were her father.
B: I'm not. I'm her mother.

Mother: "Did you enjoy your first day at school?"
Girl: "First day? Do you mean I have to go back tomorrow?

Headmaster: I've had complaints about you, Johnny, from all your teachers. What have you been doing?
Johnny: Nothing, sir.
Headmaster: Exactly.