Moving Zip Code

[Naka]

A blonde is speaking to her psychiatrist.

"I'm on the road a lot, and my clients are complaining that they can never
reach me."

Psychiatrist: "Don't you have a phone in your car?"

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

Psychiatrist: "Uh ... How's that working?"

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

Psychiatrist: "And why do you think that is?"

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