A middle aged woman went to her cosmetic surgeon to see what her options were concerning her rapidly sagging face. "We can give you an old fashioned face-lift, or we can use a new high-tech procedure called the knob."
"What is the knob, doctor?", she asked.
"It is a procedure where we install a knob under the hair on the back of your head. We then connect it to the facial muscles which sag, and when you see new wrinkles and sagging, you just tighten the knob a few turns and your skin is nice and tight again."
"Oh, yes! That is what I would like to have", she replied excitedly. The operation was a complete success and she looked 15 years younger.
As time passed, when she would notice new sagging, she would simply tighten the knob and viola! Her face was beautiful again.
One day about 8 years later she woke up one morning and saw very large bags under her eyes. Alarmed, she called her doctor and reported the bags.
"You had better get right over and let me check this out!" the doctor replied.
After examining her, he said "the bags under your eyes are your breasts."
To which she said, "Well, I guess that explains the goatee!"