Before revision: It is theorized that an emotional affair can injure a committed relationship more than a one night stand or other casual sexual encounters.Schutzwohl, Achim Koch, Stephanie "Sex differences in jealousy: The recall of cues to sexual and emotional fidelity in personally more and less threatening context conditions."
After revision: In this way viewing of pornography can be classed as an emotional affair Koch, Stephanie "Sex differences in jealousy: The recall of cues to sexual and emotional fidelity in personally more and less threatening context conditions."