A blonde driver gets pulled over by a female cop, also a blonde.

Cop: I need to see your drivers license.

Driver: Digging in her purse asks, “What does it look like?”

Cop: “It’s square and has your picture on it.”

Driver: Finds a square mirror, looks at it, and hands it to the cop

saying “Here it is.”

Cop:  Takes the mirror, looks at it and says, “Ok, you can go.  I didn’t realize you were a cop.”