Not sure how I should feel about this...

My boyfriend and I have been dating for about 8 months now.  We both have social media accounts, including instagram.  I'm not sure how I should feel about it when he starts following a user/account whose posts consist mainly of naked or mostly naked girls. These aren't "well-known" models.  For some reason, I don't think it would bother me if he was following a Victoria's Secret model or account, for instance.  On the one hand, it's not like he knows these girls personally (or at least I don't think he does); but on the other hand, it makes me feel a little insecure and disrespected on some level.  I don't even know if it's worth bringing it up in a discussion with him.  I just wonder how he would feel if I started following guys who post nearly-naked pics of themselves. Am I just being silly about this issue?