There is a Show in Japan called "Can I Go Home with You?" In one of the episodes, a girl named Erika made a deep impression. Erika's room was so messy that there was no place to put down his feet, there was not a single edible food in the kitchen, and the residue from the pot seemed to have been kept for a year.
Just when people thought she was a senior housewife, she introduced her ex-boyfriend, a person who was born in the same month and the same day as her. At first, the two thought it was fate, but what they didn't expect was that the two were actually twins, but the two faced separation as soon as they were born and never saw each other again.
When they grew up, they met because they were friends, and then the two of them were very close, so they established a male-female relationship and lived together.
What I didn't expect was that after the two met their parents, they found that the two were actually related by blood, and they were also twin siblings. The boy committed suicide because he could not accept it, and although the girl did not die, she was still paying tribute to her boyfriend.
Rachel, an American girl, also encountered a similar thing, when she was 27 years old, she met her true son Sean, in their words: "the first time they saw it, they felt inexplicably attractive", and eventually they also met and fell in love.
But in the end, it was found that the two were actually half-siblings, but they had never known it. Although in the end they learned the truth, the feelings of the two could not be separated.
The fact that "lovers become brothers and sisters in the world" may seem absurd, but scientists point out that this may be due to the phenomenon of "hereditary attraction".
(The girls that Duan Yu likes are all cousins)
<h1 class="pgc-h-arrow-right" data-track="9" > laws of nature</h1>
We know that if you reproduce with close relatives, whether it is an animal or a human, it will lead to a variety of genetic diseases in the offspring, such as European royal hemophilia. In order to avoid breeding with close relatives, different organisms adopt different reproductive strategies, in which the rooster will obviously prefer the hen they have never seen, the male lion will leave his own population when he grows up, and the female will stay in his own lion group; among bonobos, the female will leave his own population and the male will remain in the original population.
Human beings also use laws and morals to restrain the behavior of inbreeding, and through research, it has been found that the more children who grow up together, the more likely they are to have problems with their feelings, for example, most of the child brides in the old society are unhappy.
Because adopting such a reproductive strategy can significantly reduce the problem of inbreeding, it has been retained by various organisms to this day, but scientists have found that if two close relatives do not live together for various reasons, or even do not know each other, then when they meet again after growing up, sexual attraction will appear between the two.
The British Guardian once reported a case in which a pair of brothers and sisters did not live together since childhood, and when they grew up, strong emotions developed between the two, and even had 4 children.
In the drama "Thunderstorm", Zhou Ping also falls in love with her half-sister and makes her pregnant.
<h1 class="pgc-h-arrow-right" data-track="15" > hereditary attraction</h1>
For those who are related by blood, but have not lived together since childhood, and do not even know that the other party is actually their brothers and sisters, the reason why the two can fall in love, experts explain, this may be because humans have more affection for people who have similarities with themselves, and will think that the other party is more attractive and trustworthy.
Two people who are related by blood also have a very high degree of genetic similarity, so each other's personality, personality and interests will make them attractive and fall in love.
But if you are a sibling who grew up together, this relationship will not occur, and this is the Westmark effect, which points out that humans have a natural antipathy to inbreeding.
To be clear, while experts give the answer as to why siblings who grew up together are more likely to attract to each other, the answer to this question may not be just one, but may be the result of a combination of factors. For example, every year there are many missing children, and many people are successfully retrieved, but they almost do not fall in love with their close relatives, which also shows that hereditary sexual attraction is not absolute.