Porn - the act of viewing others screwing to please an audience of either prepubescent males or to an older audience with an addiction to their special places. It is an ever growing industry, with $14 billion in their pockets, it seizes the attention of many males (and some females) away from their own personal lives - even destroying marriages and soon-to-be married couples. It is an industry that does not care if that is your sister or mother, wife or child, it will take your money and run with it.
In my personal views and opinions, I believe that when a man is in a committed relationship with someone, he should stop viewing porn. Not only is it a principle matter, but it is the simple fact that his partner should be enough to satisfy his sexual cravings (not some sleaze who can take three men at once). Especially in marriages, it is even more important as they made sacred vows to one another, to pledge themselves for eternity, and yet we find them going for divorces and splitting families apart due to someone viewing porn in an addictive matter.
I hate the idea of someone I love watching porn, despite it actually happening to me. The one I am going to marry has an addiction, and has been the utmost honest about it. He is struggling, and I can see that in his eyes. Instead of kicking him to the curb, I am doing what I can to help him overcome it - not shame him and leave him for good. Albeit, there are those that cannot or will not leave their porn, who value it over their loved ones - and they do deserve to be kicked to the curb.
Otherwise, if they want help, if they want to change, help them, do not shun them! It makes it worse if you do not offer to hear their side of the story, to offer a hand to help them overcome this addiction. I tried to view it myself, to get an understanding of how and why it was addiction - and I abhorred every second of it. I did well to finish one minute of a video, because it all felt fake, it felt staged (and of course I am aware that it is supposed to be), and it was disgusting to me. I do not want to watch other people under (or in some cases, above) the sheets, much less more than two people doing the deed.
So, if you know someone who views porn and they either are in a relationship with someone or they are with you, do not give up on them! It is just like those who are addicted to drugs or alcohol, they are addicted. They need support in order to do it (you would not want to be alone if you have a problem to take care of) They need help, not hate.