...if extra characters were added to the cast?
I mean had Ross actually married Emily and she became a cast member? Or if Phoebe found someone and he joined the show as a regular? It seems like it might be a way for these characters to continue to evolve and stay interesting. I'm still single, but most people my age have been married or divorced. Other shows like "One Day at a Time" and "Make Room For Daddy" added spouses. Otherwise we know when a character is going to come onto the show, they're only going to appear for a while, and then disappear. And usually it seems like it's some way of trying to stir up the fire that Ross and Rachel had the first year.