What's a joke you haven't used yet, but are dying to share?

Read also:

• What is the estimated number of people with an extra X chromosome?
• How short is too short for a skirt?
• Does centrifugal force teach us about gravity?
• What is the best/cute/funny/playful chat/conversation between brother and sister?
• Is there an MBTI personality that is more or less likely to handle stress?
• Do you think trump realizes that if he significantly decreases the size of CIA, that there is a higher chance of him being assassinated?
• Why do some people hesitate to say 'I love you' even after their partners have said it first? How can one interpret this behavior from their loved ones?
• How do you recognize when your mental health might need attention?
• In Italy, how do people greet each other when they meet for the first time (e.g., on the street)? What's a good response to that greeting if you're not from Italy or don't speak Italian fluently yet?
• Is there anything wrong with me because I'm still single?
• Do you remember one day, you put a deep smile on someone's face and made them very happy?