I think it's kinda simple. If I told you I was watching you right now, it would be creepy. People don't like being watched when they can't control it. Some peop

I think it's kinda simple. If I told you I was watching you right now, it would be creepy. People don't like being watched when they can't control it. Some people don't like being watched at all. It's a pretty normal human response. I know that I for one get all weird and vain and uncomfortable when someone is taking a picture. At least then I know I can relax when they put their phone down. I'd guess the reaction is some variant of that reflex.