If you really want to learn a language then it's important to be able to understand the jokes told in that language. This is especially useful in English because jokes form an important part of the English language A man goes to the doctor and says, "Doctor, wherever I touch, it hurts."
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!"