Love at first sight is a love model that people have been yearning for since ancient times, often in literary works, movie plots, and it is also very blessed and desirable; Different psychology parties have different interpretations of love at first sight, so let's take a look. 
Swiss psychologist Carl Jung believes that personality is composed of three parts: consciousness, individual subconscious and collective subconscious, and the main content of the collective subconscious is the archetype, which is not the memory appearance left in the brain by the things experienced in life. There are as many archetypes as there are typical situations in life.
The opposite-sex archetype establishes an unconscious standard for us that influences our choices and reactions to the opposite sex. The basic function of this primitive image is to guide people to choose a partner and establish a certain relationship. According to Jung's theory, the process of finding a love partner is to project our original intention onto a potential object, which is what we often call "finding a soul mate".
More realistically, Jung believed that everyone has an unconscious image of the man or woman they are looking for. The more someone matches the criteria of his projection, the more willing he is to develop a personal relationship with that person. When you meet such a person by chance in your life, you will have "love at first sight".
Social Cognitive Theory.
Psychology defines the first cause effect as having a greater effect on the information obtained at the beginning than the information that comes after. The first cause effect is an important mechanism for the formation of the first impression, the first cause effect is easy to form between unfamiliar people, the first impression is the impression formed by the first meeting, mainly according to the other party's dress, expression, appearance, etc. to form an impression, the first impression in interpersonal communication makes people have preconceived ideas, and the probability of a good first impression producing love at first sight is very high.
Cognitive schema theory.
Schema refers to the cognitive structure, which is not a material structure, but a mental organization, which can help us perceive the characteristics of the surrounding environment, and can organize and classify the object information. The structure of this cognition is the formation of an experience, and people in their long-term lives, influenced by their parents and the surrounding environment, will form a "schema" for the other half in their brains, and when this person is very in line with your schema, love at first sight is generated.
The subconscious influence of paternal or maternal love.
Psychologist Sigmund Freud proposed the concept of "libido", which is the instinct of living beings and is the driving force of mental activity. Libido will drive people's psychosexual development in early childhood, from birth to end can be divided into 5 stages, at the age of 3-5 years is called the *** period, at this time the child will form a father-lover, mother-lover complex, but with growth, this complex will be suppressed into the subconscious, in the future with people, meet the opposite sex similar to the father or mother, it is easy to have love at first sight.
In conclusion, love at first sight is a wonderful emotion that has many physical explanations in addition to the psychological aspect. Some people believe that because of the different genes in the body, it is possible that the opposite sex and the opposite sex may attract each other through "smell" and eventually become married. Some people believe that it is the effect of "love substances" such as dopamine, isoproterenol, phenylethylamine, endorphins, etc., among which phenylethylamine is the most prominent, it is an excitatory substance in the nervous system, once you meet your loved one, this trait will work in the body. It is also believed that it is caused by the fact that the hormones of both men and women meet at the peak of their time"Love at first sight".
Will "love at first sight" love last?
Studies have found that couples who report love at first sight seem to have higher levels of relationship satisfaction and stability, but this is most likely an illusion created by the partner to enhance the relationship. Falling in love often involves cognitive biases that enhance the other person's perception and make the relationship feel special. Therefore, love at first sight may not be as common as what we see in film and television works, and many couples are not necessarily love at first sight, but when your boyfriend who has been in love for many years says to you: "In fact, the first time I saw you, I identified you", he is not necessarily telling a lie.
However, there are some good times in any relationship together, that is, you appreciate each other at the beginning of love, but after being together, each other's shortcomings are exposed, and if you are not tolerant, you will naturally start to look unpleasant, and if you don't operate, it will slowly fade. Therefore, long-term relationships need to be managedAfter the passion, you see each other's shortcomings or advantages, how do you look at everything he does, in fact, everyone has advantages, everything has two sides, if you can see each other's advantages, appreciate him more, you can also think about everything from a good angle, you will still be very happy with each other, and you can still continue to love each other. Love can have a moment, but true love needs time and energy to water, a lucky love, you need the two of you to take care of it, find more advantages of each other, praise him more, and your relationship can go from love at first sight to growing old together.