This is why (a) I love geeks and (b) the rest of the world wonders what they’ve been smoking!

Er, full disclosure. I have a fancy piece of software that takes my digital photographs and processes them to mimic the grain pattern of, say, Tri-X B&W (i.e. analogue) film. When I demonstrate it to normal, rational people they shake their heads in wonderment and talk about leading-edge uselessness.