Sue and Dan are in a relationship. Their friend, Matt, is romantically interested in Sue. If Matt tries to “steal” Sue away from Dan, then he is doing what researchers call “mate poaching.” To try to poach Sue, Matt might do things like insult Dan, try to compete with Dan, tell Sue that she could do better, and/or try to keep Sue from hanging out with Dan. There is no shortage of examples on TV shows and movies of one person poaching their friend from an existing romantic relationship (e.g., Made of Honor). But outside of Hollywood, is mate poaching by friends common?