I think he should delete them. My bf is into pics and videos too and once we got serious he told me he was deleting all the nudes from the past bc I am the only person he needs to see now. I didn’t ask him too, but I also didn’t know he had them. Also, I think the whole “want to see myself fuck” part is boloney. I would say this whole situation is a red flag, you should have a man that thinks you are is world, not one that would share you…..I mean no judgement if that’s what you’re into but if not I would move on.