the foremost is the sexual drive and itвЂ™s made to get us available to you looking a prospective other. This is important for survival of the species from an evolutionary perspective.
The second reason is attraction, or intimate love, also itвЂ™s the longing we feel become with one person that is particular. Effective neurochemicals dopamine, norepinephrine and serotonin rise through the human body, igniting the euphoric feelings that include dropping in love and focussing power on that on any particular one person that is special. Serotonin is associated with mood legislation, social behavior, appetite, digestion, rest, memory and sexual interest and function, generally there is going to be insomnia, lack of appetite and increased passion.