Read the research article "Is the Internet for Porn? An Insight into the Online Adult Industry", cited by an OpenDNS blogger. OpenDNS is the internet's leading free solution for blocking malware and pornography.
I never knew that "42.7% of all Internet users view" porn and that "the Internet porn industry yields more revenue [97 billion USD in 2006] than the top technology companies Microsoft, Google, Amazon, eBay, Yahoo!, and Apple combined." (from a secondary source in the research article).
The OpenDNS people are good! Pope Pius XI, author of Vigilanti Cura (1936), would be impressed!