My (28F) boyfriend (28M) has gotten really into femdom porn lately, and it's making me uncomfortable. How to proceed?

TLDR: Found out my boyfriend watches femdom porn and has been exploring that side of his sexuality without telling me. It's making me feel inadequate and it's not something I'm into at all. Has anyone dealt with something similar?

So, I have been with my BF for around 3 years now. We've had challenges here and there, but overall, I'd say I'm very happy in the relationship. I think my boyfriend is an awesome human being, I enjoy spending time with him, debating for hours on end about politics, and he also happens to be very caring and compassionate.

He's also quite open-minded, and I guess that's why, 1.5 years ago, when I mentioned trying pegging, he was open to trying it, even though he had never thought about doing it before.

I had never tried it either, but I was interested in being more sexually adventurous at the time, so we went for it.

We did it a couple of times, but I realized that I didn't enjoy it that much. The process is very messy, and honestly, I just realized that I'm not that kind of girl, I just enjoy vanilla sex. My BF, however, loved it. He asked if we could do it again, I told him that I wasn't into it anymore, and we just moved on and kept having "regular" sex.

He never brought it up again, our sex life is great, we try to check in and talk about that kind of stuff regularly, and he's always said that he was satisfied with our sex life, so I thought that everything was okay.

Fast forward to a couple of days ago. My computer broke down, so I had to use his for work. That's when I came across a couple of porn screenshots (not hidden at all, I didn't look for it). I reverse image searched them, and I realized that it was mostly female domination and humiliation stuff.

I talked to him about it as soon as he came home from work that day. He said that he's discovered this part of his sexuality recently, that he watches that kind of content when he's really horny, but that he always feels very guilty afterward. He also said that he doesn't do it when we're together (we don't live together full time yet, but we're together around 80% of the time), and that he knows I'm not into that, so that's why he hadn't mentioned it before, and uses porn to explore that part of his sexuality. He was very embarrassed and on the verge of tears for the entire conversation, so it was hard getting answers from him.

I feel weirded out that my BF has to look at porn for arousal, it makes me feel like I'm not enough sexually for him. The fact that it's femdom material makes me even more wary, because, as I said, I have no desire to do kinky stuff, vanilla sex is enough for me. He said that we didn't have to do that kind of stuff together, but I don't feel comfortable knowing that he can't really do everything he's into with me, it makes me feel like we're not compatible enough in that regard. Also, as a feminist, I find the porn industry icky, ethically speaking, and I don't get how someone who respects women can in good conscience watch porn when it objectifies women that much, especially given how much sexual abuse is rife in this industry.

We agreed to take a break and not see each other for a week to process all of this, and I'm kind of lost on how to proceed.

Has anyone been through something similar? Would love to hear how you handled it, whether it worked out or not. Open to all kinds of feedback, it would be help a lot <3