Until puberty my friends and I (both male and female) ran around sometimes naked or at least bare-chested in warm weather without any suggestion of obscenity, and as a result I have a healthy lack of self-consciousness about my body. We complain that children are no longer innocent and do not have a childhood, yet we persist in imposing our adult hang-ups on their unformed bodies. The result? Girl children who know how to be coy, who are obsessed with their "sexuality" and become anorexic.
A photograph of a naked child is a natural image which we should take for granted, and only merits intrusion if sexually explicit and clearly involving abuse. It may be a "grey area", but inappropriate reactions are also an abuse of the child concerned and can do lasting harm.