The fact that the concept of "love" people put different things no doubt. Psychology has long been interested in "love" does not count pages devoted to love, but that she has not ceased to be a mystery. In ancient Greek, the following terms to define the various manifestations and forms of love: Eros – a spontaneous, passionate, irrational love, obsession, seeking to complete physical possession; Branch – love, friendship, due to social connections and personal choice, rational and verifiable consciousness; storge – a quiet, safe love, tenderness, especially family. Finally, agape – selfless love, sacrifice, it is associated with full dedication and then dissolved in a loving caring for a loved one. An important source of forming the image of love in man is the experience gained in the parental home, the impact of the behavior of the father and mother, since the image of love is not limited to ideas about how to behave during sex, but largely determined by the internalized form of communication in living together with other people. Attempts to construct theoretical models of love are different claim to greater globalization.

Still, such cases are known. Differences between the models are in love estimation parameters: the optimism-pessimism. In the pessimistic model postulated weakness and imperfection of man, in an optimistic and constructive power of love. Pessimistic model proposed by L. Casler. He identifies three factors that make people fall in love: 1) the need for recognition, and 2) the satisfaction of sexual needs, and 3) a conformist response (as made).