According to Webster's dictionary, love is defined as “a feeling of strong personal attachment; ardent affection or strong attachment for another person. But in reality, what is love? What causes butterflies? What causes these emotions that cannot be described in words other than “you know?” » Every person's feelings are unique when it comes to love, which makes it even more difficult to define. Although relationships and experiences differ for each person; The concept of love involves all the same three stages: lust, attraction and attachment. These three stages each have their own physiological effect on a person. The reactions a person in love may have can include butterflies, sweaty palms, rapid heartbeat and much more, but what is the real cause of this? What happens to a person's brain when they are in love? There are two theories behind love that seem to complement each other when it comes to defining love. These two theories are psychological and physiological. Separately, each theory works well to illustrate the phenomenon that is love, but together the theories seem to fill in the gaps that the other leaves behind. The physiological theory explains love thanks to hormones. Hormones can be blamed for influencing many situations, but how a person decides to respond to hormones is where the two theories intersect. In the book “Human Development” written by James W. Vander Zander; Michael Liebowitz is quoted as follows: Love has a unique chemical basis. Love and romance are among the most powerful activators of the brain's pleasure centers, and they can contribute to a special transcendent feeling - a feeling of being in the middle of a paper...... which is the cause of a person's discomfort. feelings should be too. Although the definition and beliefs involved in love may differ depending on the person, time and culture, there is no doubt that the emotion is a real phenomenon for the person experiencing it. Works Cited Fisher, Helen. Why We Love: The Nature and Chemistry of Romantic Love. New York: Henry Holt, 2004. Print. Fromm, Erich. The art of loving. New York: Continuum International Publishing Group, 2000. Print.Lewis,Thomas, Fari Amini, Richard Lannon. A general theory of love. New York: Random House, 2000. Print. Liebowitz, Michael R.. The Chemistry of Love. Boston: Little Brown and Company, 1983. Print.Vander Zanden, James W.. Human Development. New York: Knopf, 1985. Print.Zeki. S. “The neurobiology of love. “FEBS letters. 581. 2575-2579. Internet. April 11 2011.