Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Nothing ruins a summer picnic like a dry, mealy, tasteless watermelon. Maybe you learned to knock on a melon or look for certain webbing patterns when trying to find the ripest fruit, but what about investigating the watermelon’s…umm…butthole. Technically, a watermelon butthole is called the blossom end, but the internet has decided to rename its underside spot and who are we to argue? What exactly is the watermelon butthole method? The good people of the internet contend that the best way to select a watermelon is to examine its blossom end (the brown circle opposite the stem side). To select the juiciest, tastiest watermelon, look for a fruit with the tiniest “butthole.”   Simple enough, right? But do experts agree this method works?  “No. Every watermelon has a blossom end and they all pretty much look the same,” says Jesse James Wiggins, a fifth-generation watermelon producer and shipper, and past president of the National Watermelon Promotion Board (NWPB). “There’s no …