Genetics, who studied the DNA of married couples, came to the conclusion that people, choosing their partner, subconsciously choose and resemble their DNA. In strangers, these molecules differ greatly.
The study involved more than 800 married couples of the Caucasian race, born in the period 19301-1950. and are in permanent marriage.
It was noted that there is a significant percentage of correlations, with sufficient, however, genetic similarity.