A blonde went to her mailbox, looked in it, closed the door of it, and went back in the house.

A few minutes later she went to her mailbox, looked in it, closed the door of it, and went back into the house again.

And so she repeated this several times, and the neighbor that was watching her said,

“You must be expecting a very important letter today the way you keep looking into that mailbox.”

The blonde answered, “No, I am working on the computer, and it keeps telling me that I have mail.”