‘Love is greater than the sum of its parts.’ Or is it? Why do we assume that the experience of shared love is greater than the sum of its parts, the sum of the individual love that is shared? Why do we insist that love is greater than its total and not equal to the total? Is this a problem of words and their meaning, a semantic issue? Although we see an increased effectiveness in those who work together, we observe no direct evidence that the combined effort is greater than the SUM of its parts. Consider music, food, or sport. Name your passion. When listening to a powerful or sublime piece of music, is our listening experience the result of everything that is contained within the music, plus what we bring to it? Or are there are other factors contributing to the experience? Same with a great painting, an inspired meal, or a winning season. If so, what are these invisible ‘greater than’ elements or forces? Are they apprehendable or measurable? If not, how or why do we imagine or ‘experience’ them? I propose, in the case of mutual love and other passions, that the mysterious ‘greater than the sum of its parts’ is not really a synergetic effect, but a myth, an unfounded belief in what is, in reality, a natural emergence of complex brain interactions.