Dolf Zillmann  

"Prolonged consumption of nonviolent and violent pornography increases men’s propensity for committing rape [...] The values expressed in pornography clash so obviously with the family concept, and they potentially undermine the traditional values that favor marriage, family, and children [...] Pornographic scripts dwell on sexual engagements of parties who have just met, who are in no way attached or committed to each other, and who will part shortly, never to meet again [...] Sexual gratification in pornography is not a function of emotional attachment, of kindness, of caring, and especially not of continuance of the relationship, as such continuance would translate into responsibilities, curtailments, and costs ..." --"Effects of Prolonged Consumption of Pornography" (1986)