My husband watches cheating porn, should I be concerned???

My husband and I decided to order take out and open a bottle of wine. My husband fell asleep before our food arrived so I grabbed his phone to check the status of our delivery. While using his phone I noticed that he had porn up in one of his tabs. He was literally watching videos from the cheating category. When I viewed his searched history, I saw cheating, nurse, and step mom porn. He mostly searched for husbands having extramarital affairs. I don’t know how to feel. Does my husband want to cheat on me? Why does he want to watch porn with men cheating on their wives?? We’ve been married for 10 years and I thought he was happy. I’m kind of freaking out, but I don’t want to do or say anything because I’ve been drinking.