You're using the wrong word here. The issue of weather pornography is "addictive" has been visited multiple times by multiple DSM committees in recent times and in the latest release DSM-5-TR they have found that pornography cannot and does not cause "addiction". There may be disorders associated with it, but it is not addiction. Using that word allows for framing which justifies the use of violence against people and is, frankly, more damaging than pornography.