Does it bother you if your boyfriend or husband watches porn?

My boyfriend, I’m SURE, he watches porn. But he always tells me that he would like to watch porn together. Honestly, porn makes me sometimes uncomfortable because I feel like I’m just being compared or I’m just not pleasuring him, or I’m probably not enough so he needs to watch others. I think our sex life is great but when it comes to this conversation it really bothers me and he doesn’t understand why it does. (I tell him) he says it’s normal and we can learn new stuff and why not. So him saying that makes me believe he does watch porn but idk. Am I over reacting? How do I get over it? I don’t mind learning new stuff because WHY NOT lol. But just the fact watching others doing it and him getting hard for other girls just bothers me. Idk I’m just very insecure about myself.