There was a sailor deployed to the Arabian Gulf. While he was on the ship he
received a letter from his girlfriend. In the letter she explained that she
had slept with two guys since he'd been gone and that she wanted to break up,
AND she wanted the picture of herself back.

So the sailor does what any squared-away swabbie would do. He went around to
his buddies and collected all the unwanted photos of women he could find. He
then mailed about 25 pictures to his girlfriend with the following enclosure:

" I`m sorry, but I can`t remember which one you are. So please take the one
of you and send the rest back."