All time (in history of world) best:
For Americans, WW-II was a logistics push operation: a relatively very small number of people were serving as the tip of a spear but the vast bulk of the ten million or so people in uniform were serving in rear areas. A whole lot of people were sitting around on Pacific islands for four years.
One guy in that situation had a girl friend who'd promised to remain true and marry him at war's end; ten months on the island he gets a letter saying she was marrying the banker's son and could she please have her photo back...
The guy took his camera and made a tour of the island he was on photographing everybody on the island who was never going to win any sort of a beauty contest, the sergeant in the mess hall, several of the local cannibals including the chief, monkeys and apes, the pet pig....
And then he put every one of those pictures in a box along with the girl's picture and a note sort of like
"Dear Sally Ann, For the life of me I can't remember which one of these pictures is yours; could you take your photo and return the rest to me?