The man said, " I want to have sex with you right now. I'll drop £500 on the ground at your feet and in the time it takes for you to pick it up, I will have sex with you from behind, and then be on my way!"
The woman thought it over and told the man to wait a minute. She called her girlfriend on her mobile phone and told her about the man's proposition.
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."
An hour and a half later, the lady called her girlfriend back.
"What happened?" the girlfriend asked.
The lady said, "That son-of-a-bitch had £500 in 20p coins!!!"