Recent discourse on child pornography falsely portrays it, like child sex in general, as a disaster for the child. Children are (supposedly) "traumatized" because they cannot consent, and their parents cannot consent for them. Thus all child-adult sexual contact is called rape (actually, it is statutory rape which usually involves no real physical violence at all), and the child pornography is considered documentation "crime" and more or less permanently remains available on the Internet for all to see.
Unfortunately, there are small numbers of people who really do abuse children, and who even violenly rape them, without the child's consent or that of their parents. These are, and should be crimes, of course.
Yet there are many children seen in child pornography whose words, facial expressions, body language, and orgasms show that they thoroughly enjoy the sexual activity, sometimes enjoying it immensely. Why causing another human being intense enjoyment and pleasure, without any complaint from the alleged victim or his/her parents, is necessarily a crime is one of the contradictions of our sex-conflicted age.