That is why chastity may be spoken of as the first political principle. Nothing so undermines the marital sexual bond as does pornography. Pornography isolates the physical act of sex, and its pleasure, from reality by making it an object of observation. Sex, as John Wayne once put it, is not a spectator sport. Making sex a spectacle sensationalizes it and severs it from its proper unitive and procreative context.
Pornography makes the part into the whole and the means into the end.
They are sterile. Pornography censors conception, because the possibility of conception naturally orders sex to a purpose within the family. The violation of the fundamental human relationship between husband and wife wreaks havoc on the whole social and political order. If chastity is indispensable to political order, then the politics of pornography is clearly chaos, and the tyranny to which chaos leads. The ancients understood this clearly.