A woman goes into labor with her child. The doctor says that they have invented a new device to transfer the pain of child birth to the father. He asks if it is ok to use the new device. The couple agrees and so he turns the pain to the father to 10%. The man feels nothing. They then bump it up to 20%. He still feels nothing. They keep doing this until they have the machine up to 100%. The man still felt nothing so they go home happy, until they find the milkman dead on the porch.
By the way my Grandma told me this one