Kittens (also known as the Pain Series) is a shock site located on Encyclopedia Dramatica. The webpage contains a montage of images showing genital diseases, mutilation, aborted babies, hentai pornography, images from other shock sites like Goatse and Tubgirl, and more gruesome content. In the background, a loud sound effect of a man repeatedly screaming in pain is played. Also the images are clickable links to the Last Measure shock site, which has pornographic content and will probably harm your computer.
NOTE: The following shock site contains extremely graphic images.