Porn is a tool, it's neither intrinsicly good nor bad.
It's all about how you treat or view porn so to find out how it influences people you'll have to look into how people treat it and view it in their lives.
The above poster has issues with porn and feels it is bad FOR HIM!
There are couples who watch porn together as a fun sexual practise, some people view it as an art form which they appreciate as a an art that can arouse feelings and even communicate a message, for others it's just a tool to help them with sexual gratification.
Personally I just haven't used porn that much in my lifetime, I think once, though I make a point of having at least one orgasm a day, so unless I'm getting laid I will masturbate but probably without any pornographic aids. So it hasn't really influenced me.
I'd suggest looking for some papers written by sexologists, rather than asking us, we are just people and on the topic of Porn and how it precisely influences society we are largely as ignorant as the next guy. The only thing that can come from this is getting opinions on how porn has influenced them, not how it influences sex culture. Hell we may not even be able to do THAT right, becuase arguably a large part of influence is not knowing that you are being influenced.
Hope it heps!
