The callousness it takes to murder and torture is ceratinly helped developed by pornography. The same murderous callousness and intemperance can be developed in alternate ways -- meaness and cruelty is the main one, along with drunkeness and being a wastrel. The murderers that develop solely from porno addition -- they are rare, if at all.
Alchohol is still the main adjunct to murder.
See posts #19 and #21.
Our local priest said that porn is the # one confessed sin. AND it is the cause of many ruined marriages. It is an addiction.