Can you think of anything that:

1) Should not be photographed? Why?

The first thing that comes to mind when I think of things that should not be photographed are things that depict pain or death. The argument could be made that war, and pain must be portrayed, because the world is not as peaceful as people like to believe. However I think that there is enough pain in the world that people should not be reminded of it constantly. 

2) cannot be photographed? Why?

Truth. I dont think that Truth can be photographed. We never know the entire story behind a photograph. And so therefore even Lies, because for all we know everything we see in pictures could be a lie.

3) you do not want to photograph? Why?

I would not ever want to photograph an image of a person that is truely feeling pain. Pain is a feeling that I do not want my photographs to project. Photography is made to treasure  our memories, but a memory of pain is not something I would want to create.