Photos of minors urinating exist. The film exists. These minors were working in the nude in the company of adults and were, for nearly four hours, absent any oversight or protection from any quarter. Adults may not solicit, coerce nor pay for minors performing in the nude. No Minor may grant such permission for himself because they do not possess the legal standing to allow said permission.
Adults protect children.
That is a core value of any civilized Society. Basic biology demands we protect our future which is manifest in our children. There are purposes to which children may not be set. Only the most corrupt interpretation of existing Law and the First Amendment protection for the freedoms of artistic expression could be stretched to sanction the use of professional children to act out the fantasies of commercial artists. And the Supreme Court has thus ruled in the Traci Lords decision.