There are plenty of fans who would say Ross and Rachel were the supreme couple of Friends. Sure, they kept us hooked with their ‘on-again, off-again, on-again, off-again’ romance, but how healthy was their yo-yo relationship really? A new theory suggests that Monica and Chandler were actually the REAL driving force behind the success of the series. Here’s a few examples why they give us ultimate #RelationshipGoals.