Porn?!

Ok, so I was going through my husbands phone today. (I normally do this when I get suspicious and think he's cheating.) Guess what I find?! 5 PORN VIDEOS that he downloaded to his phone!! Boy was I pissed!! This isn't the first time this has happened with him. When I confronted him, he said he doesn't care that I found those PORN videos. Then I reminded him about how hr gave me his word, it would never happen again. He says he doesn't care?! ARE YOU KIDDING ME?! Am I not good enough for you?! It's bad enough that he's admitted that he still has feelings for his ex baby momma. Is this a sign? Am I doing something wrong that he has to watch PORN to be satisfied? What do I do? Has anyone else dealt with a situation like this? I absolutely despise any man who has to watch PORN for satisfaction. Makes me sick!