Blonde Joke No. 889

"I have a problem," a blonde complained to her friend. "I'm on the road a lot, and my clients are complaining that they can never reach me."

"Don't you have a phone in your car?" asked the friend.

"That was too expensive, so I did the next best thing. I put a mailbox in my car."

"A mail box? Does that work?"

"Actually, I haven't gotten any letters yet."

"And why do you think that is?"

"I figure it's because when I'm driving around my zip code keeps changing."