A blonde cop pulls over a blonde speeder and asks to see her driver's license. Which one is that? asks the speeder, rummaging through her purse.

The one with your picture on it! answers the cop, getting impatient. Oh, here it is, says the driver, handing the cop her makeup compact with the mirror open. Gee, says the cop, looking into the mirror, if I had known you were a policewoman I never would have stopped you.