A man took his pregnant wife to the hospital to give birth, and the doctor
told them that he'd developed a new machine and asked if they'd like to
try it out. The machine could take some of the pain of childbirth from the
mother and give it to the father to ease the mother's burden.

Well, they thought that was a good idea and decided to give it a try, so
the doctor set it on 10% to begin with, telling the man that even 10% was
probably more pain than he'd ever experienced. But the man was surprised
at how little pain he was feeling & asked the doctor to raise it. So he put
it up to 20% and when the man still felt fine, he raised it to 50% and
finally 100%. After it was over, the man stood up, stretched a little. Both he
and his wife felt fine. The wife was relieved at having an almost painless
labor.

Later, when they took the baby home, they found the mailman dead on their
doorstep.