A married couple was in a terrible accident, and the husband's face had been severely burned. The doctors could not graft any skin from his own body, so the wife offered to donate some of hers. The only skin the doctors felt was suitable came from her buttocks. The husband and wife agreed that they would tell no one the specifics of where the skin came from, and the doctor honoured their request.
After the surgery was completed, the man looked more handsome than he had ever before. All his friends and relatives gushed about his youthful beauty.
One day, overcome with emotion, when he was alone with his wife, he thanked her yet again for what she had done for him: "How can I possibly ever repay you?"
"Darling," she replied, "I get all the thanks I need every time I see your mother kiss you on the cheek."