The power of 5 cents

A woman was walking down the street when a man she worked with approached her. He said, “I have a proposition for you. I’ll drop 500 dollars on
the ground at your feet and in the time it takes for you to pick it up I can have my way with you from behind.”

The woman said, “Let me call my girlfriend on my cell phone and get her advice.”

Her girlfriend said, “When he drops the $500 on the ground, I’m sure you can pick it up and run before he gets his pants down. Call me back and tell me what happened.”

Later, the lady called her girlfriend back.
“What happened?” the girlfriend asked.
The lady said, “He had that $500 in 5 cent coins!”

Who took my MONEY[?]