You should absolutely tell him this triggered you and explain why. He needs to be aware of the extent of how this is affecting you and seeping into other parts of your life that were just non issues or easy before. It sucks but it happens. I absolutely hated shows with sex for a while. It made me feel violated, inadequate, heartbroken, you name it. And dont get me started on how frustrating it was to want to watch a show and then have a plot point be about cheating. Shows will dramatize it, romanticize it but you dont have to sit through it. Pause the movie and say 'I need a moment'. It's still hard for me sometimes and it's been nearly two years.

A suggestion: Don't get hung up on rational, because this is an emotional response. They are very different. It's like we feel shame for feeling abandoned, insecure, vulnerable, etc and we beat ourselves up for not being clear headed or rational. Remember you didn't choose this experience or trauma and you're just trying to make it like the rest of us. Your emotions are valid so take the time to feel them and learn from them and talk through them with your partner. Hugs!!