Knock-knock jokes are a big deal in my family. My grandpa used to tell them so often that my grandma joked his gravestone would read: “Knock, knock. Who’s there? Not John—he’s dead!” Sadly, my grandpa ...

TikTok user @calumdilieto was watching Netflix when he found out that the well-known knock -- the one with seven taps, a pause and then a final two knocks -- had a name. TikTok/calumdilieto For better ...