Boyfriend follows models and sexual accounts on Instagram and SnapchatWatch
If he cares about you, he will try and stop, or at least reduce it.
But you also need to understand that he isn't doing it to hurt you, it's just what he sees as sexual..
I have mentioned I found it odd he follows them but he has carried on following them..
But talking dirt about him to your friends (who are naturally going to be on your side and will brand his behaviour 'creepy') isn't going to help anyone, and it certainly won't make those feelings of insecurity go away.
He is just holding out for a better fish but will manage with you until then.