Some people ask why jokes exist. I say, when a mommy and daddy love each other very much, they have sex, and they make another one of you.
The Origin of Jokes
Explanation
The joke plays on the idea that the reason people exist is similar to the reason jokes exist – it's a result of a cause (love/sex and creativity/humor). It's a silly analogy trying to explain something complex with something simple.
Toby :)
*proceeds to die*