S/O looking at porn?

How do you feel about your significant other viewing porn? I found today on my boyfriends computer that he's been watching and reading it. I wasn't even snooping, but it was in his search history when I went to google and everything was below the search engine. Some might say that it could be for him wanting to try new things. But when I ask if he watches porn he lies to me and says no, not since we've been dating. It's been a year already! I'm just confused and it honestly makes me feel like such a shitty person for being upset but my mind immediately goes to, I'm not pleasing him. 😔