The Jock Sturges thing is because he photographs (mostly) female models, many of whom are under the age of 18, in the nude. There are a lot of people who find it offensive. Even after they're made aware of the context in which the pictures are taken (mostly at nudist colonies where people don't feel self-conscious about their nudity, and where Jock has been a very familiar presence for many many years, so he's not sneaking around in the shrubbery snapping paparazzi-style porno-shots), they still freak out that it's exploitation and smut.
you forgot to mention
these are people he has/had been photographing for 10-15 years
or maybe longer ... they weren't strangers but good friends