teen porn?

Internet Porn Addiction

My husband and I have been togethter 12 years and have a family together, I am not what you would call in great shape but then again niether is he, We have a reasonable sex life, althought most of the time I initiate it,
My issue is othtat he looks at porn but rather what he looks at, teen porn ,and the comment when I commented on computer imaged incest was, well at least when people look at it it's not real, does this mean he looks at it too? I don't snoop and the only reason I know about the teen porn is cos I was in the room when he was doing a clean up of his system and he had to move files.
I have long ago come to terms with porn,I like movies of it, but this disturbes me, especially as we have daughters, any advice please?