What makes us "click" and immediately we like some people and not others, why we feel very close to someone, although we know little about them, and how can we fall in love at first sight with a strager?

Under the new book by psychologist Rom Brafman, this emotion is not only common to all humans, but can be explained scientifically. As explained by British authors, "every time this happens, there are five very specific factors.

Factor 1: honesty

The first factor is honesty: when we are "human and open" the man who is with us can relax and it's easy to like us, even to fall in love with us. Moreover, when both reveal good intentions about who they are they create an ideal environment for intimacy, which in other cases takes time to be created, explain the Brafman.

Factor 2: Proximity

"Proximity can also ... do miracles. If you want to "click" to someone, make sure to get literally closer to him/her "say the British writers. Knowing someone slowly and meeting him/her often in a neutral environment such as an office or a department of the neighborhood, there is created an intimacy that can form the basis for a meaningful relationship.

Factor 3: Magnetism

The third "key" is what Brafman call magnetism, sex appeal. We emitt it when we feel confidence, faith in our abilities and comfort with oneself. "If this is something that becomes evident in a discussion, then we are very close to fall in love" they write in the book.

Factor 4: similarities

Demolishing the myth that opposites attract each other psychologists emphasize similarities rather than differences. The more common interestings we have with someone, the easier it is to develop a deep relationship with him/her, they say! "We are" programmed "by nature so among a group of individuals we search for the one that looks more like us. When we recognize similarities to a stranger, even subconsciously, we feel an attraction and sympathy, "they explain!

Factor 5: common experiences

To share common experiences with someone we like, brings us even closer. Indeed, the two psychologists argue that "the more bad is the common experiences, the stronger is the bond that is created between those who share them", so that two people come together and grow together easier.