What exactly is there definition of porn? As long as it excludes bikini model pictures, i'm happy.
But seriously. Many people in the country probabily look at porn on a daily basis. In America, it is considered freedom of press to publish any photo you wish to whatever audience you want (other than the so-called "undeveloped" minors of the nation, which I feel is unconstitutional to keep certain rights from, but I may be biased), and freedom of accociation to view these images as long as you follow the rules the publisher sets down. No harm is truly done. Only studies that show it is addictive cause issues with congressmen.
And it is well known that there is always good free porn in the world, you just have to look for it. Google Images with safe search turned off is a good starting point. Just make sure to keep it in something like coLinux, Mac, or Linux so that you don't get viruses.