The following from Alvin Cooper's (Stanford U) study of sex addiction
In a study in the May 1998 issue of Professional Psychology: Research and Practice, Cooper also found that more than 91 percent of Internet users spent less than 11 hours a week logging on to sexual sites. About 82 percent spent less than an hour doing so, "with very few negative repercussions," he says. (Full text of these research articles appears at
http://www.sex-centre.com.)
Since this study includes women (chatroom "cybersex") one can guess that only about 15 or 16% of males computer users look at porn more than an hour per week. If this is true, it seems like good news, but i have no way of knowing and cannot surmise whether this is something men would lie about. But it doesn't seem to jive with the number of hits at porn sites. Yet other studies come up with very similar numbers.
I must wonder about what definition of porn is being used here or in any other survey, or what one you would want to employ. I can recall this man i met in nyc who said he was "addicted to porn" and yet he never used pictures of any kind---he created his own in his head. How does he fit this?