Two chemicals produced in the brain have a major say on whether we stick with the same partner for a long period of time or seek novelty every so often.
One of the world's leading anthropologists, Dr Helen Fisher has studied on the subject of romantic love for more than three decades. Dr Fisher says that the attraction with a partner will largely depend on the chemistry of a person's personality with the partner.
According to Dr Fisher, personality can be broadly classified into four types, explorers, builders, directors and negotiators, which are largely dependent on two of the brain's chemicals, dopamine and serotonin, along with testosterone and oestrogen.
If serotonin is the dominant chemical, then the personality of a person can be classified as "builders" and such people are calm and are loyal to their partners. The domination of dopamine is the exact reverse, with the tendency to seek novelty being the dominant trait of that person's personality.
Oestrogen produces personality traits such as high imagination and very good social skills while people with high levels of testosterone are tough minded and decisive.
"There will always be magic to love, but knowledge is power. If you know who you are, what you seek and how you and others love, you can capture that magic, find and keep real love, and make your dreams come true", Dr Fisher said.