Ehhh...I guess it can be a problem if you let it. I view adult entertainment maybe once or twice a week, briefly, if I am not getting any from the wife.
I really think it is a double standard. Women read all those romance books, which are actually pretty graphic in their descriptions and give women a very unrealistic expectation of how men are supposed to act and shit. I understand that their primary means of erotic gratification is imaginative. However, men are motivated visually, so why is our erotica -- video and pictures -- somehow evil? Why are we supposed to feel guilty about looking at something naughty, even though that is how our brains are hardwired? It's just another example of how men are oppressed in our society, not women. Why is Harlequin romance okay and Playboy evil? They both exist to make us horny, but our society says that female gratification is okay while male gratification is harmful.
What is the difference between a picture like the one in DMX's sig above and a literary passage that goes a little something like this: "He pulled her roughly to him. She could feel his heart pounding beneath his hairy, muscular chest. His manhood was a hot, molten rod of iron pressing into her stomach. It was so big! The size of it, pulsing against her, made her dizzy with lust." It's the same difference, gentlemen.
As far as all the studies...well, a gun is completely harmless until you place it in the hands of a fool or a maniac.