A married couple was
in a terrible accident where the woman's face was severely burned. The doctor told the husband that they couldn't graft any skin from her body because she was too skinny. So the husband offered to donate some of his own skin. However, the only skin on his body that the doctor felt was suitable would have to come from his buttocks.

The husband and wife agreed that they would tell no one about where the skin came from, and requested that the doctor also honor their secret. After all, this was a very delicate matter.