I have weird guilt associations with masturbation and pornography that results in me going months without watching it. What's strange is that I didn't even grow up in an overly religious household - I just associate it with something bad, and that if I watch it, something bad will subsequently happen to me. The logical side of me knows that this is not true, but whenever I do succumb to temptation, I feel a crushing sadness after.
With that being said, I also don't think pornography is particularly healthy for habitual users. The need to see excessively more graphic content to achieve continued stimulation is a slippery slope. I still want to be aroused looking at a normal breast - I never want to be in a situation where being with a woman in real life is not as stimulating as watching pornography.