The effects of pornography may differ from person to person and can impact sexual relationships. The effects of pornography are unclear.
While some literature reviews suggest that pornographic images and films can be addictive, insufficient evidence exists to draw conclusions. With regard to examinations of the possible effects on domestic violence, rape and child sexual abuse, several studies conclude the liberalization of pornography in society may be associated with decreased rape and other sexual violence rates, suggest no effect, or are inconclusive. Pornography addiction is not an officially recognized condition.
Within the field of pornography research, there are many challenges that arise due to strong opinions and feelings on the topic. Confirmation bias is particularly prevalent due to societal taboos surrounding pornography and while many studies hypothesize about and study negative effects of pornography, few researchers explore potential benefits or positive aspects of pornography. Furthermore, much of the veracity of the research produced by this field of study often leaves much to be desired and a large percentage of studies suffer from methodological issues. In one meta-study by researchers at Middlesex University in England, over 40,000 papers and articles were submitted to the team for review and 276 or 0.69% were suitable for consideration due to the low quality of research within the field.
In Effects of Prolonged Consumption of Pornography, a review of pornography research conducted for the Surgeon General of the United States in 1986, Zillmann noted that inconsistencies in the literature on pornography exist, but overall concluded that extensive viewing of pornographic material may produce some sociological effects he argued were negative, including a decreased respect for long-term, monogamous relationships, and an attenuated desire for procreation. He describes the hypothetical basis for these conclusions stating: