Boyfriend's porn-- should I ask him if he's still watching? (After he told me he'd stop?)

So my boyfriend is a very sexual person. He used to have a porn blog with pictures of his... assets with unsettling captions (like "Come to bed with me"), but he didn't remove the pictures/delete his account. One night, a mutual friend showed a lot of our other friends the pictures. Even though this in itself didn't make me that uncomfortable, I didn't like the idea of my beau's dick being all out there on the Internet for anyone to see. I told him how it made me feel, and he deleted his account.