Recent studies in neuroscience have indicated that as people fall in love, the brain consistently releases a certain set of chemicals, including the neurotransmitter hormones, dopamine, norepinephrine, and serotonin, the same compounds released by amphetamine, stimulating the brain's pleasure center and leading to side effects such as increased heart rate, loss of appetite and sleep, and an intense feeling of excitement.
Research has indicated that this stage generally lasts from one and a half to three years.
Most commonly, love refers to a feeling of strong attraction and emotional attachment.
Ancient Greek philosophers identified four forms of love: essentially, familial love (in Greek, storge), friendly love (philia), romantic love (eros), and divine love (agape).
Lust is the feeling of sexual desire; romantic attraction determines what partners mates find attractive and pursue, conserving time and energy by choosing; and attachment involves sharing a home, parental duties, mutual defense, and in humans involves feelings of safety and security.
It is a much more potent sentiment than a simple liking for a person.Many other languages use multiple words to express some of the different concepts that in English are denoted as "love"; one example is the plurality of Greek words for "love" which includes agape and eros.Although the nature or essence of love is a subject of frequent debate, different aspects of the word can be clarified by determining what isn't love (antonyms of "love").For example, compassionate outreach and volunteer workers' "love" of their cause may sometimes be born not of interpersonal love but impersonal love, altruism, and strong spiritual or political convictions.People can also "love" material objects, animals, or activities if they invest themselves in bonding or otherwise identifying with those things.