Carla was well into her seventies when she went to her doctor complaining of nausea, exhaustion, and occasional cramps.
After a thorough examination the doctor sent her to the hospital for a battery of tests, and finally confronted her with the results.
"Mrs. Barber, medically impossible though it seems at your age, there's no doubt about it: you're pregnant."
"Impossible," she cried, and fainted dead away.
When she came to, she staggered to the phone, dialed her eighty-two-year-old husband, and screeched, "You've knocked me up, you randy old goat!"
There was a long pause at the other end of the line. Then a voice said, "And to whom am I speaking?"