This is a joke that I made up one time, and it just might tickle your funny bone.
Son: Dad, you always tell me funny jokes. Can you tell me a sad joke this time?
Dad: Yup. But it's a really sad one.
Son: I bet you I won't cry. Tell me!
Dad: Alright. The sad joke is.....there is no sad joke.
Son: Oh man! That's sad.
Dad: I'm sorry son. Don't be sad. The best we can do is come up with funny jokes.
Son: Dad, you always tell me funny jokes. Can you tell me a sad joke this time?
Dad: Yup. But it's a really sad one.
Son: I bet you I won't cry. Tell me!
Dad: Alright. The sad joke is.....there is no sad joke.
Son: Oh man! That's sad.
Dad: I'm sorry son. Don't be sad. The best we can do is come up with funny jokes.