An anonymous reader asks: "We all joke about how much of the Internet's traffic is porn, but are there are credible studies that give a definitive answer, or at least make a reasonably intelligent guess? Looking at the amount of movie clips and entire flicks posted to the '*.erotica.*' newsgroups on a daily basis, I have to believe that porn is a significant percentage of the traffic, but is it 10%, 20%, 50%? More? I've tried to research this on my own, but Google keeps sending me to sites with porn, not site about porn. (No, really!)"