Well as you yourself have pointed out it is normal. The issue is can you be okay with it. I mean honestly I would encourage you to try it on your own....that whole thing about porn only being for men is bs...they have shown that women become just as sexually aroused as men do while watching porn....it just isn't as widely discussed.

I would encourage you to watch some porn on your own and masturbate, do this a few times and see if it changes the way you feel about your boyfriend...it won't chances are. Its the same for him, he probably loves you a lot regardless of what porn he watches.

After you get comfortable on your own you should bring some porn into the bedroom and you two should watch it together and well you can get creative from there.

Or if it is something you simply can't stand that is fine talk to him about it and ask if he will stop and I'm sure he will be understanding but I'm sure he will also want a lot more sex. Or it could be the other way around and you could be understanding and just treat it like a hear no evil see no evil type of thing....I mean at least he isn't cheating on you...and trust me porn does not lead to that...cheating leads to cheating...porn just leads to...well jackin it.

Hope I helped...honestly I've known several women you really enjoy porn...maybe more than me.