I don’t want my boyfriend to watch porn

My boyfriend and I (both 21) have been dating for 2 months. While he had sex as a teenager, I am a virgin and want to wait until I'm married to have sex, and he has happily agreed to waiting. He recently asked me my opinions on porn, and I was honest and said I didn't watch it and didn't like it. All he said was that he assumed everyone watched it, which I believe implies that he does. Personally, I don't want a partner who watches porn. He already knows that I'm insecure about being a virgin going into marriage. While he'll already have experience, I will have to learn and I may cause the sex to be less enjoyable for him at first. Him watching porn adds to this because he'll have way more ideas about how a woman should perform, and I simply can't mimic that as a virgin. I want advice on what to do about this. Should I bring up how it makes me even more insecure, and how? Is it even fair of me to ask a man to not watch porn when I'm also not having sex with him anytime soon? Should I just pretend I don't know he watches it and try to move on? Any viewpoints or advice are greatly appreciated.