Just to reinforce the idea that odd numbers are important, art and craft forms across the globe rely on odd multiples. A chef (I am one, so I know) would never put an even number of something on a plate, unless that was the point. A bonsai tree will never have an even number of branches, or leaves, or trunks, unless that is the point. Why would a photograph be any different? Good composition is often reliant upon odd numbers, they are just more aesthetically pleasing.

And Trog, I hate to say it, but photography has little to do with the process, only the result. Same as any static artwork. Situationist art is different, but for the most part the process of creating the piece is not as important as the finished piece. A crappy photo from inside a lion's cage is not as good as a good photo from outside the lion's cage, period. The Darkroom/photoshop is just as much a part of the photographic process as the camera is - you cannot have one without the other. "Purity" in photography is a myth - the process of photography isn't finished until the print is framed, and that includes post processing. It may seem contrary, but post processing is indeed pure.