When couples look into each other, there's a good chance that they may possibly be looking at a modified reflection of themselves. Research has found that people tend to choose their romantic partners who have similar shape, size, and ethnicity as themselves.
The phenomenon of people with similarities getting attracted to each other is called positive assortative mating. Researches have been studying this phenomenon for a long time. The saying "opposites attract" might not be always true when it comes to people finding their mates. Rather, the saying "birds of the same feather flock together" would be more applicable when it comes to people choosing their lovers.
When people spend time with someone similar to themselves, they find the other person to be familiar to them. Familiarity is something that all people find attractive. Studies have shown that people get attracted to what is familiar to them.
Similar level of attractiveness
People tend to choose their partners that are around the same level of attractiveness. This is to ensure that they don't get cheated. Research confirms that people look for partners with similar levels of attractiveness.
Most people are self-aware of how attractive they are. They realize that their best chances of their attraction getting reciprocated are with those who are at a similar level of attractiveness as them.
There are often situations where doctors are seen to marry other doctors or lawyers are seen to marry other lawyers. People tend to mate with people from a similar background because of convenience and geography. This goes to show that people not only get attracted to other people with physical similarities but with background and geographical similarities as well.
Similar personality traits
It has often been seen that introverts are more comfortable with other introverts and extroverts are more comfortable with other extroverts. Studies have shown that people are more likely to be attracted to other people with similar personality traits as well. Researchers have found a positive correlation among couples regarding altruistic traits, confidence, and range of interests.
Staying together for a longer time
If you and your partner have a lot of similarities between each other, then it is good news for you! Research has found that the more couples have in common, the more likely they are to stay together for a longer time.