For Chimpanzees, Peeing May Be Contagious—Just Like Yawning Is for Humans, Study Finds
If you see or hear someone yawn, you might suddenly feel the urge to do the same, thanks to a well-studied phenomenon known as “contagious yawning.” Now, new research suggests urination may function in a similar way: Captive chimpanzees that saw their peers peeing were more likely to take a tinkle themselves.