Is my boyfriend addicted to porn ?

I saw his browser history and noticed that he watches a lot of porn. Today he was at work watching porn around 2pm which I think was his lunch break. Then when he came home he watched more porn and played sex video games on his computer. Even yesterday when we were on the phone his history showed him watching porn while I was on the phone and he asked me to have phone sex with him and the sound kept going out as if I was on mute. When I would ask if he was still there the sound would come back. We’re not in a long distance relationship or anything so why do you think he’s watching so much porn? Is this normal?