A guy volunteers to take his wife's childbirth pains... As the expectant couple gets to the delivery room, the doctor tells them about an experimental machine that can transfer part of the pain of childbirth from the mother to the father. The husband volunteers to be a guinea pig and gets strapped in. ""How much do you want to try?"" asks the doctor. ""Let's go with 50%,"" says the man. After a few minutes, the doc asks the wife how she's doing. She says the pain is far less than her last delivery. The doc then asks how the husband is holding up. ""This is a piece of cake,"" he says. ""Turn it up. Let's try 75%"" The doctor obliges and the wife relaxes even more. ""This is amazing,"" she says. The doc asks the husband how he's handling the pain. ""This is a piece of cake,"" he says. ""I think women must have low pain thresholds if this is all they have to deal with during childbirth. Crank it up to 100!"" The doctor does and the wife finishes the delivery with no pain at all. The doctor examines the husband and finds he has no ill effects from the procedure at all. A day later, they leave the hospital with the baby and go home, where they find the mailman dead on the doorstep.