Survey of research into the effects of pornography
aeon.co
aeon.co
TL;DR: Almost everyone watches porn, and people are starting to watch younger and younger. However, almost all research shows it's not harmful. Porn is also a reflection of the viewer and society.
https://www.youtube.com/watch?v=2PeQG61W4i0
The Scandinavian approach to sexual education goes a long way to ensuring children's confidence about their body and their feelings.
Sometimes conventional wisdom is conventional for a good reason.
As before, people's pre-existing beliefs and social structures make it hard to even test the conventional wisdom. Contradicting it is declared evil or foolish before-hand. Given history of "wisdom" in this area, it's right to test it in ways that might show contradictions. People have always been exceedingly foolish on these things when they cast judgment before collecting data. No reason to believe it will be different this time.