Bob Preston at Xfanz.com recently discovered that the Internet Movie Database (street name: IMDb) conceals all listings of triple-X films and mainstream movies that feature explicit scenes. That may be news to Preston, but it’s not new to the database, according to an IMDb rep who told Preston, “This is not a new feature and has been present on our site for many years.”

Here’s what’s happening: Visit IMDb.com and search for, say, Deep Throat. Its listing doesn’t come up. Search for Deep Throat star Linda Lovelace. Her listing doesn’t come up. Now search for the 2005 mainstream documentary Inside Deep Throat. That doesn’t come up, either, but if you search for the documentary’s co-director, Fenton Bailey, his listing does appear – presumably because he has a host of other mainstream credits. That’s the only way you can see Inside Deep Throat‘s IMDb listing.