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 FACT CHECK: Are These Dildos 28,000 Years Old? Here is the Truth About Oldest Sex Toys Claim The oldest dildo in the world is approximately 28,000 years old. It was discovered in 2005 in Tbingen, Germany by archaeological researchers at the university there. It is eight inches long and " The Surprising History of Dildos: Humans Have Been Using Them for Over 28,000 Years