For the record, I rarely watch porn.
I understand what you're saying and porn can be damaging, but in moderation it is not a problem. The
desire to watch porn is completely normal. Humans trying to create sexual stimulus is not a new thing but unfortunately it's just naturally become so diverse and extreme.
Here is a good video on how porn is changing society:
http://www.youtube.com/watch?v=wSF82AwSDiU
Lots of things in modern society aren't natural as far as the brain and evolution are concerned. There's not a lot you can do about it I'm afraid.
The majority of men watch porn and for the
majority of them it's not causing a problem in their or their partners lives.