Sex joke «Great deal»

Johnny wanted to have sex with a girl in his office... but she belonged to someone else.
One day Johnny got so frustrated that he went up to her and said, "I'll give you a $100 if you let me have sex with you!" but the girl said, "No."
Johnny said, "I'll be fast, I'll throw the money on the floor, you bend down, and I'll be finished by the time you pick it up."
She thought for a moment and said that she would have to consult her boyfriend... so she called her boyfriend and told him the story.
Her boyfriend says ask him for $200 then pick up the money very fast... he won't even be able to get his pants down.
She agrees and accepts the proposal.
Half an hour goes by and the boyfriend is waiting for his girlfriend to call. Finally after 45 minutes the boyfriend calls and asks what happened...
She said, "The bastard used quarters".