Interesting Aimee.
Art is an appropriate way to show the truth about anything, as far as I'm concerned. That's why art therapy is so effective - because people can draw (or otherwise depict) things which they cannot otherwise express. In this instance, I would have imagined that the 'Tulsa' collection tells us truths about Larry Clark's own experience of growing up in Tulsa. A less sanitised version than we normally see depicted, but a true version nevertheless.
What disturbs me the most about 'Brother and Sister' is not the supposed relationship between the two subjects, nor is it the nakedness. No, I'm disturbed by the *violence* inherent in this image. She is tied up with a gun held to her. Yet most people home in upon the potential of a sexual relationship between siblings.
The second photograph simply depicts the cold reality of mortality, to me, particularly in the areas not normally shown to the outside world. The poor areas, the areas where families struggle, where homelessness is high, where incidence of addiction is endemic and a boy might most likely be shooting amphetamine by the time he is sixteen. Infant mortality just happens to be the most emotive way to convey a cold normality. I thought we looked from a vantage point above the casket, simply because we were looking at a graveside scene - and that the man bending down was merely priest, graveside attendant of some description or family member who has opened the casket after agreeing to the photography taking place.