Is this okay?

So my bf told me tonight that a girl that he went to school with has been posting pictures of her butt in her fb story and I asked him why he had her on there still if he knew she was doing that or why he was looking at them and he said well it's not like I talk to her. I told him he should delete her or block her stories and he just asked me why.. I'm honestly flabbergasted that he seems to think this is totally okay.. Am I being overly dramatic? I'm not even sure why he brought it up to me. I honestly just think it's disrespectful to me that he keeps her on there knowing what she does but then again I feel like maybe I'm just over thinking it.

Just so everyone knows he told me she has a nice butt and that's what really upset me and the reason I wanted him to delete her.. It was very disrespectful for him to say that to me.