Abstract
The result of the interaction between these systems considered by Fisher, ideally reduce the energy expenditure that implies reproduction, being able to be called in humans "romantic love" and be the developed form of a system general courtship among mammals, that evolved to stimulate choice of couple. When a scientist is asked what is love? The most likely answer is "a series of physiological reactions produced by neurotransmitters, chemical stimulations and olfactory sensations (pheromones).
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