Husband with instagram

What do you guys think about your husband or boyfriend following account of girls that only post half naked pictures and videos? I feel bad for feeling that he shouldn’t be doing that. To me, it’s like he is lusting after them. The girls also look nothing like me and they all look similar, so that’s me being insecure. But i feel as though I should just be enough for him rather than him spending his day on instagram where he spends a lot of time on. I know he is with me and not them, but I can’t help but feel like he would rather me be like them. I trust him, but i want him to be mentally faithful to me as crazy as that sounds, and if it makes sense. I asked him why he does it and a few accounts i asked him to unfollow because my parents see who he follows, but he just follows them again. he said he likes to look at them, but shouldn’t he like looking at me more?