The world's oldest known dildo dates back approximately 28,000 years. Discovered in 2005 by researchers from the University of Tbingen in Germany, this ancient artifact is an eight inch long stone phallus that's still The Long And Satisfying 28,000 Year History Of The Dildo Ancient Pages Batteries not included 28,000 year old stone dildo found in german cave Metro News The history and evolution of the dildo