True, Ham-Bam, it does have to be defined, but I'm sure any given study could define it within its parameters. I will search to see what I can find on the subject when I get a chance.....

Okay, I googled it and there are some scientific articles on the subject. If someone wants to know what these studies have to say, then I suggest they research it. We can spend lots of time giving our personal opinions. For example, I personally believe it does do permanent damage. But if people don't want to take my word for it, studies researching it are available.

Research can be done on a subject if the subject is defined by the researchers. It is true that the definition can vary, however, depending on the study. However, I think most of us know in general what is meant by "porn."

I do have official credentials to support my knowledge of research. It's not something that I need to argue.