One man asked a schoolboy, "How old is your father?"
The boy replied, "He is 8 years old."
Man: "What?"
Boy: "Because he became a father when I was born 8 years ago."
Question: What goes up and never comes down?
Answer: Up
Question: Why did the teacher wear sunglasses in class?
Answer: Because he was trying to see if his son was in his class.