Are there any ethics involved for those watching porn?

This is meant to be serious question. I really want to know if ANY morality plays a role in such things? Why do you think it hurts others if one watched it? Should it? Do ethics even matter here?

Help me figure this out.
Update: Mystery meat: BE more insightful. I want a philophical answer....
Update 2: I'm sorry, but most of you seem to be idiots.
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