Little Johnny was puzzled as to his origin.
"How did I get here, Mommy?"
His mother said, using a well-worn phrase, "God sent you."
"And did God send YOU, too Mommy?"
"Yes, Johnny, He did."
"And GRANDMA and GREAT-GRANDMA and DADDY, too?"
Again the answer was "Yes, Johnny, He did."
Little Johnny shook his head in disbelief.
"Then you mean to tell me there has been no sex in this family for 200 years?!?!? No wonder everyone is so cranky!"