“Sometimes, though, porn’s defenders overcompensate. They are too ready to interpret the lack of unequivocal data about porn’s impact as unequivocal proof that there is no impact. In a field as hard to measure as sexual behavior, this seems unwise. Pornography may be more likely to turn us into solipsistic masturbators than violent rapists, but it’s hard to imagine that it has no effect at all. The pro-porn argument, which insists that pornography is changing but denies that it changes us, appears contradictory. It inverts the anti-porn mistake of seeing porn as the key engine of transformation, instead giving it no power whatsoever. But sex is always changing, and, though porn can’t explain it all, its role can’t be ruled out, either.”