A couple went to the hospital to have their baby delivered.
Upon arrival the doctor said that the hospital was testing an amazing new machine that would transfer a portion of the mother's labour pain to the father.
They agreed to participate in a trial.
The doctor set the machine to 10% for starters. As things progressed the husband felt fine, so the doctor increased it to 20%. The husband was still fine. In fact his blood pressure was totally normal.
They decided to try 50%. Still the husband remained calm and pain free. They increased the level to 100%. The wife delivered a healthy baby with no pain and the husband was fine.
When they got home they found the milkman dead on the porch.