As far as emotions go, a lot of our emotions are animalistic. We have similar systems in our brain that control aggression, fear, and emotional reactions in general. The limbic system is something found in both humans and animals. Even though humans have evolved and possess higher-order intelligence, we still have some more base, animalistic behaviors because there is still a part of us that uses aggression to protect our young (much like animals do), predatory aggression (in order to survive in a dog-eat-dog world), and fear (to protect us from certain danger; the main goal: survival). There are reasons why some of our responses are animalistic. It's part of our hard-wiring. However, we have higher-order processing, we have the gift of language, reason, a conscience, and moral understanding of right and wrong. This is what separates us from animals. When you mention love, unfortunately love truly is a chemical reaction, and a lot of of it is biological and meant for procreation (it's all about survival), but that doesn't mean that it makes love less satisfying or more animalistic. Love can add elements to a life that wasn't there before. Companionship, compromise, understanding, and caring. While love is a simply a chemical reaction it does bring an aspect to life that makes anyone believe that it can be more than just certain chemicals being released into our synaptic clefts.But if you want the scientific concept behind love here it is: I read about it in "The Brain that Changes Itself" (Awesome book…highly recommend it). The feeling of falling in love is similar to having a high. Your body is producing a high level of endorphins, but your brain is also reacting to being in love. Your limbic system, which is known as pleasure centers, are involved in processing emotion. Experiments were performed where an electrode was implanted in the septal region of the limbic system and stimulated. These patients experienced a euphoria so powerful many patients pleaded for the experiment to continue!The septal region of the limbic system also fires when pleasant subjects are discussed with patients and during orgasm. These pleasure centers are part of the brain's reward system, known as the mesolimbic dopamine system. So when someone uses a recreational drug (like cocaine) it acts by lowering the threshold at which the pleasure centers will fire, making it easier for them to turn on (which causes an intense euphoric feeling). This also happens to people with bipolar disorder when they move into their maniac highs (Their pleasure centers fire easier). Falling in love also lowers the threshold at which the pleasure centers fire, making the same euphoric feeling one might get from a high. Crazy, huh?! Source(s): Psychology graduate and researcher 4 years ago .