14 Weird Things That You Can Catch and Contagious
Perhaps the best-known contagious behavior is yawning -- even dogs can catch yawns from their owners. Contagious yawning is a sign of empathy and a form of social bonding. But there's one type of person who seems to be completely immune to the contagion effect of yawning. A study last year found that psychopaths, whose personalities are marked by the inability to feel empathy, don't "catch" yawns like the rest of us.