Porn just happens to be one of the things that makes me happy, thoughout my life I always seemed to have a habit of some kind. Even back when I was 8, I was looking at softcore bondage and felt a certain way that led me to link masturbation with looking at those images. I guess I just kind of knew without understanding, if that makes sense.
I'm recovering from a long period of loneliness & sexual frustration and an even longer period of repression, during which I was definitely an addict and had to teach myself to use it in moderation. At this point though, I think my porn watching habits are finally healthy for me. Even now that I finally have a partner with similar libido & sexual interests (to keep it short & SFW, I'm not the slightest bit vanilla), we still watch and trade porn with each other because it makes us happy to be lewd. It feels great to be able to share that joy with somebody else.