I thought this short interview with a philosopher about the nature of sexual desire would interest some people here. It touches on porn, masturbation, and addiction. I don't endorse his conservative views but I do find them interesting and useful. http://www.open.edu/openlearn/history-the-arts/culture/philosophy/sex-and-perversion#
Roger Scruton is generally very good on aesthetics and culture etc. Consider the etymology of 'perversion'... a turn inward away from the outer world. Auto-eroticism is wrong because the energy is not directed outward to its true object.
