It is a nostalgic time right now, and photographs actively promote nostalgia. Photography is an elegiac art, a twilight art. Most subjects photographed are, just by virtue of being photographed, touched with pathos. ... All photographs are memento mori. To take photograph is to participate in another person's mortality, vulnerability, mutability. Precisely by slicing out this moment and freezing it, all photographs testify to time's relentless melt
Susan SontagUsing a camera appeases the anxiety which the work-driven feel about not working when they are on vacation and supposed to be having fun. They have something to do that is like a friendly imitation of work: they can take pictures.
Susan Sontag