Is it something about me, or something I not doing right or enough of?

This question just plaques me constantly lately......

My husband seems to rather masterbate then to have sex with me. And when we do have sex or are planning on it...he seems to want to watch some clips of porn....or old pic or videos of me being sexual. What is wrong with me that he has to get worked up or in the mood.... before being with me. I have mentioned that this bothers me and he still does it.