Here are some of my old favorite shots of portraits ‘in situ’. A term I only learned today was actually official even in photography. We used to talk about in situ protein immunohistochemistry used to look at proteins as they occur in tissues (or as close as possible). The similarity is: as we try to look at our subjects and the way we look at them, changes them; be it proteins in tissues or people in places..
I had earlier forgotten to mention, some of these people had seen me slightly before or just after I took the shot, like the blushing fisher woman who blushed at a remark by someone I was with; the man with the briefcase who had just seen me across the street before looking away.