Blond, female cop pulls blond, female driver over for speeding.
"May I see your driver's license, please?"
Driver fumbles in her purse, says, "I can't find it. What does it look like?"
Cop says, "It's about this big and has your picture on it."
Blond driver fumbles more, finally comes up with her compact, opens it, sees herself and hands it to the cop.
Cop looks at it and says, "Gee, if I'd known you were a cop I wouldn't have stopped you!"