Monica Geller altered the trajectory of the entire series, having life-changing effects on its characters. Summarizing the role of Monica in the series, Martin Gitlin wrote in his book "The Greatest Sitcoms of All Time" that while her friends "were ... just out to make the most of their social lives", Monica "sought to keep the others in line" while searching for "Mr. Right", who surprisingly turns out to be close friend Chandler. Several years before Monica and Chandler became romantically involved, Cox once joked in an interview that if her character were to ever have sex with another main character, it
Brother and Sister over them and their marriages as a consequence. The stories have been interpreted as a wish by women for the return of their brothers, freeing them from this control. However, the issues of when the stories were collected are unclear, and stories of this type have been found in many other cultures, where this issue can not have inspired them. Modern psycho-analysis interprets the relation between brother and sister in this story as a metaphor for the animalistic and spiritual duality in humans. The brother represents the instinctive and the sister the rational side. As "Brother and Sister" opens, the