Boyfriend watches porn at work? iin?

Hello everyone. So about 7 months ago, I moved across a whole state to live with my boyfriend. Left my family, friends etc. I want to preface this by saying, my boyfriend and I have a GREAT relationship in general. He's sweet, funny, loves me, I love him, have a good sex life, etc etc. However, when I moved here, I realized that he had been going home on his lunch breaks to watch porn. He says its because it was slow at work, and he was bored.. which could be true, but still. That happened about 3-4x a week. Then, I got upset with him subscribing to a porn website..and he ended up "cancelling it" after a month. After that "subscription" was done, he signed up for another one, DESPITE the fact that he and I had gotten into an epic fight the first time. He cancelled that one though..And to be fair, he WAS honest with me when I questioned him. He said he subscribed because the quality was better, no viruses blahblah..I just didn't want him wasting money on something as frivolous as porn!

Cut to NOW. We had been actually doing really well in that regard for the past few months. Probably only because my work schedule changed and I come home before he does so he doesn't get the chance to porn it up. I noticed however, his laptop has been missing. Yesterday we got into a fight and I accused him of watching porn at work. He didn't deny it. He says maybe once a week. He works in IT and has some sort of "private" server room he claims no one else has access to except him. But really? Watching porn at work?? He went off and said the usual, oh it's normal, guys do it way more than I do... blahblahblah. No sorry, not normal to watch porn at work.. He says porn isn't even that important to him. Seems like it is! Every fight we've had has been about porn! So obviously we're not talking today. I am even considering not coming home for a long time tonight, I am so upset.

Please help. I am tired of fighting about BIG BOOBED GIRLS ON A SCREEN! This isn't normal right?