The feelings of passionate, obsessive
love, of being in love or infatuated, as well as elation, heightened energy,
focused attention, obsessive thinking, and intense craving when she can’t stop
thinking about you, is all related to the brains elevated production of the
chemicals dopamine, norepinephrine, and serotonin. All these hormones are
released during great passionate sex.
Dopamine is the fundamental
neurotransmitter associated with romantic love.
Norepinephrine along with dopamine will create infatuation.
Serotonin is the pathway by which Dopamine and Norepinephrine can become active. Without serotonin in the brain a person would feel depressed.