Boyfriend looking at naked girls on pinterest

So my boyfriend pins and follows boards with tons of naked girls. I also know he watches porn.

For some reason the fact that he does the pinterest shit looking at naked girls bugs me. Porn doesn't really bother me. But I guess the fact that he also has to look at naked pics makes me feel like shit about myself. And it's his secret pinterest account he never told me about. I found it by searching his name. Idk what to think about all this. Advice?