My own feeling is that 12 and 13 year old's are of an age where they would not normally or naturally go around naked! and therefore it is odd, shall we say, to display photographs of naked 12-13 year olds in a gallery. 2-3 year olds perhaps, even 7-8 year olds maybe. But not 12-13 year olds who are reaching puberty.
I wouldn't care how acclaimed the photographer is, he is not beyond reproach, and being acclaimed does not give him a licence to exhibit contraversial photographs - or art - without expecting controversy
