A form of addiction amongst straight/gay men of all ages which usually involves wanking over from video hosting websites like Spankwire, xHamster , xVideos etc.,it can also be in the form of voyeurism that involves webcam to webcam activity. To some extent, sick perverts would go as gross as watching Sluts eat their own shit and drink their own piss.
Internet Porn Addiction and Internet Addiction per se usually go hand in hand.
"Dude, I need to go to a marriage counselor or a Psychologist"
"Need to get rid of this Internet Porn Addiction, it could destroy my marriage"