Disclaimer: posted this again because I didn’t have ages in the title

I was on my boyfriend’s Insta while he was next to me and I went to search the name of a person we were talking about and I was shocked to see that his explore page was full of scantily clad women and I refreshed it at least 5 times and there was still more soft porn. I know he will find other women attractive but he admitted that he watches these videos at least once and maybe twice a day. I really didn’t think he was the person to lust over women on Instagram especially to that extent, I’m really taken aback and feel like I don’t know him honestly. I was not expecting that at all. We’ve been dating for 1.5 years and we’ve had some other somewhat similar problems, but I was still surprised. I’m feeling pretty bummed out and not sure how to handle this so any kind words or advice would be much appreciated.