In a paper published in 2009 in the International Journal of Law and Psychiatry, Milton Diamond reviewed a very broad number of studies that have explored the supposed ill effects of pornography. Subsequent to his extensive review, Diamond concludes (p. 312):
"Indeed, the data reported and reviewed suggests that the thesis is myth and, if anything, there is an inverse causal relationship between an increase in pornography and sex crimes. Further, considering the findings of studies of community standards and wide spread usage of SEM [sexually explicit material], it is obvious that in local communities as nationally and internationally, porn is available, widely used and felt appropriate for voluntary adult consumption. If there is a consensus against pornography it is in regard to any SEM that involves children or minors in its production or consumption. Lastly we see that objections to erotic materials are often made on the basis of supposed actual, social or moral harm to women. No such cause and effect has been demonstrated with any negative consequence."