I have a two sided opinion...porn can be used as a tool to bring some "excitement" back into a relationship but...
For young people (boys in particular) that watch it get a false sense of what and how a woman acts, thinks, or likes in bed.
My PERSONAL belief is that besides every woman being portrayed as an sex crazed idiot, it desensitizes and demeans the act of lovemaking. Sure, everybody likes to get kinky once in a while but some of the things carried out in porn are just disrespectful. Spitting, peeing, pooping ect...
Couldn't even imagine doing that to someone I cared about. Hell, I couldn't do that to someone that I didn't care about and asked me to do it....even just for my own self respect.
I keep a high level of respect and dignity for myself and those I care about. That being said, I'm bias cause I've never slept with a girl I didn't care about, ie..1 night stand. Then I got married, and had kids. I couldn't imagine doing those things to my wife and the mother of my children. She earned my respect long ago as I did with her and would never take that for granted.
I hope that when my son comes of age (which is soon, he's 10) that he and I can talk about sex ...what it is, how it's done, and the responsibilities that come with it. Not like my Catholic, Scottish Father or super strict Jeh Witness Irish Mother of which for both the subject was taboo thus, I learned from friends and their stolen (usually from their father) porn...Only to learn later that most chicks don't beg for anal (of which I was deathly scared of ), 11inch cocks or moan in loud various ways by just touching their hair or leg.
I wish my parents where just honest with me. Either way a child will learn / want to see the opposite sex, it's natural...but to learn it from a man you respect (father) vs. some 13 virgin buddie with "3 hole debbie does the USA" is how boys should learn.