SO watching porn?

So my boyfriend was using his phone in front of me last night and i saw where he had been looking up porn. I just pretended like i didnt see it. Idk if i should be upset about it or not. I mean we live together and he gets sex whenever he wants, so why does he still find the need to look at that? It really made me feel like im not good enough for him. Are you okay with your SO watching porn?