“Opposites attract” is a common mantra often used in the dating sphere, but some people choose to defy that notion altogether.
It has been a decades-long debate about why some couples tend to look alike, at least at first glance, to the point that they are sometimes mistaken for siblings.
From similar facial features and smiles to matching eyes, these pairs have often left netizens doing double takes online.
An Instagram account called “Siblings or Dating” has seized this trend to garner over a million followers.
The page shares photographs of people who look similar, submitted by the users themselves, and asks followers to guess whether they are siblings or dating.
The answer is revealed in the second or third slide of the post.
#21

“My bf and I, some of our pics really look alike,” one person commented on Reddit.
Another said, “It's just ironic that we looked alike when we were still together, but after we broke up, we don't anymore.”
Another said, “It's just ironic that we looked alike when we were still together, but after we broke up, we don't anymore.”
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#22

“Couples often develop similar facial expressions, emotional habits, and even lifestyle patterns over the decades. Therefore, they can start looking and acting like each other,” Dr. Stewart told us.
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#23

Dr. Yellen said that while couples don’t necessarily “morph” into one another, they develop similar facial expressions, manner of speaking, nonverbal gestures, and bodily mannerisms that “make them appear more alike” even if they differ in terms of facial structures.
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#24

We also asked whether choosing partners based on facial or physical similarities has been found to have a profound impact on the long-term success or compatibility of couples.
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#25

They both pointed out that psychological similarities, including shared values, life goals, communication styles, and emotional synchrony, along with years of shared experiences, are what build a lasting relationship, rather than a superficial resemblance.
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"It might be a biological thing." Netizens speculated why some people choose to date their lookalikes


