What is the Oldest Recorded Joke in English?

A book of Anglo-Saxon poetry from the 10th century includes what researchers believe could be the first recorded joke in the English language: “What hangs at a man’s thigh and wants to poke the hole that it’s often poked before?” The punchline? (Keep it clean.) “A key.” 3,000 years before that, the Sumerians had the oldest recorded “a dog walks into a bar” joke.