Thanks for all of your responses. However, it looks like my post was misunderstood by pretty much everyone. I am in no way asking "is viewing porn a sin?". I know very well how evil it is and that is it a terrible, wicked thing. I'm not trying to argue whether or not it is wrong or who it hurts... I know very well how wrong it is, I was only trying to gather opinions on who the sin is against.
The reason being... knowing who a sin is against is essential in making reparations for that sin and will allow you to do all you can in repenting of that sin. It's difficult to repent of a sin and receive complete forgiveness if you don't know who've you've sinned against therefore not allowing you to do all you can to "fix" the hurt that you've caused.
Does that make more sense?