1st Person: "Do you know anything about this fax-machine?" 

2nd Person: "A little. Whats wrong?" 

1st Person: "Well, I sent a fax, and the recipient called back to say all she received was a cover-sheet and a blank page. I tried it again, and the same thing happened." 

2nd Person: "How did you load the sheet?"

1st Person: "Its a pretty sensitive memo, and I didn't want anyone else to read it by accident, so I folded it so only the recipient could open it and read it."