Using this type of stimulation seems to foster a preference for using images for our gratification. Clearly, it is easier to turn to this medium than to work on a human relationship. The use of pornography is an exercise of sexual infidelity, with all that goes along with that. It can lead to sexual acting out, often in private ways -- e.g. masturbation, increased time searching for more explicit materials.
We become more self-centered, less other-centered. It takes time away from the responsibilities we have for our work and family. Use of pornography robs us of supernatural grace. The deepening of grace, vital to the growth of married love, is impeded. We don't get the grace needed to sustain Christian marriage.
Check it out.