A Lady from the Revenue Service

Reaching the boy, the woman carefully drops his pants, takes hold of the boy’s testicles, and starts to squeeze and twist, gently at first and then ever so firmly.
After a few seconds, the boy convulses violently and coughs up the last penny, which the woman deftly catches in her free hand.
Releasing the boy’s testicles, the woman walks back to her seat at the coffee bar without saying a word but keeps the penny.
As soon as he is sure that his son has suffered no ill effects, the father rushes over to the woman and starts thanking her saying, “I’ve never seen anybody do anything like that before, it was fantastic. Are you a doctor?”
“No,” the woman replied. “I’m with the Internal Revenue Service.”