Pornography is a universal temptation precisely because it does exactly what the satanic powers wish to do. It lashes out at the Trinitarian nature of reality, a loving communion of persons, replacing it with a masturbatory Unitarianism.
And pornography strikes out against the picture of Christ and his church by disrupting the one-flesh union, leaving couples like our prehistoric ancestors, hiding from one another and from God in the darkness of shame.
And pornography rages, as Satan always does, against Incarnation (1 Jn. 4:2-3), replacing flesh-to-flesh intimacy with the illusion of fleshless intimacy." (from Russell Moore at russellmoore.com, in his January 23, 2012 blog entitled, "Should I Marry a Man with Pornography Struggles? My Reponse")