A man came home from work and was met by his wife who informed him that the kitchen tap was leaking and should be fixed. The man said, as he pointed to his forehead, "Do you see PLUMMER written here?" The wife said she did not.
  The next day the man was again met by his wife who informed him that the lamp in the front room did not work properly and should be fixed. The man said, as he pointed to his forehead (again) "Do you see ELECTRICIAN written here?" His wife said that she did not.
  The next day the same man was met by his wife who informed him that the hall railing was in need of repair. Again the man pointed to his forehead and said, "Do you see CARPENTER written here?" The wife said she did not.
  When the husband came home the next day, he was again met by his wife who informed him that she had been very lucky to get the tap, the light and the railing fixed by a friend of her husband. The husband grunted "HMPH and who was that?" She said, "Your friend Joe fixed everything for me."
  The husband wanted to know what Joe had charged.
  "Nothing", said the wife. "He said that I could bake him a cake or sleep with
him."
  "Well", said the husband, "When are you going to bake him his cake?"
  The wife then pointed to her forehead and said "Do you see BETTY CROCKER
written here?".