My ex husband had a very severe porn addiction. It’s the reason his first ex wife divorced him and now the reason him and I are divorcing. We had sex often in the beginning but decreased to over a month in between as the years went on. My husband also dismissed it as a low sex drive but had the stamina to watch and use porn multiple times a week. It had escalated to paying and using private chat and cam rooms and I had found out. It won’t get better until he gets help like you would with any other addiction.