When you yawn in response to another person’s yawning, you are demonstrating an ability to empathise. (That’s right, you can yawn away and an un-empathetic person will not feel even the inklings of a yawn coming on.) Interestingly, dogs will also yawn in response to human yawns, particularly those of their owners. Contagious yawning has also been found to exist between close groups of primates and, recently, wolves. So essentially, if you don’t yawn, you need to learn to love a little more. That, or you’re a cat person.