It's no surprise if similar features run in the family—genes take care of that. But "Alabama jokes" aside, how do you explain it when strangers who decide to engage in romantic relationships look like long-lost twins? Perhaps you spend so much time with each other you start to look alike, or you like your reflection in the mirror a little too much and choose someone similar to date?

A viral Instagram account called "Siblings or Dating?" turned this idea into a very entertaining game for bored Instagram people. The account which has been around since July makes 249k followers guess whether two people are related or dating based solely on one photo and the game is super addictive!

So let's play a game that might quickly become your new favorite lockdown entertainment! Spoiler alert: you might be wrong most of the time. How many did you get right? What gave it away? Let us know in the comments!

More info: Instagram

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The popular Instagram account invites followers to submit photos of suspicious couples through direct messages. They then post a selected photo with a poll in the stories where people cast their votes before the truth is revealed 24 hours later. And the truth often is a little surprising, to say the least. Turns out, it's not that easy. Even if you think you know, you might want to look again as the answer is not always what it seems! Some couples in a relationship look so creepily alike, they could easily be twins separated at birth, whereas when you think you finally got an easy one of a pair that looks nothing alike and does the classic couple pose—they turn out to be brother and sister. So the followers involved in this new trending game are often horribly wrong when making a guess. While some polls end up at 50/50, in some cases, as many as 80% of people are left in total confusion when finding out the true relationship between the "couple."

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The idea that opposites attract is a popular adage about love many people swear by. And while it might arguably be true and intriguing, let's leave that "plus attracts minus" theory for physics as many studies have shown that we more often tend to be drawn to those with similar personalities and interests. It makes a lot of sense as it's much easier to understand someone whose mind is built alike. Imagine living with someone completely different and not having a single thing in common—these incompatibilities will only grow over time. "Siblings or Dating" takes this theory to a whole new level, proving that some couples are not only similar on a psychological level, but look freakishly alike as well. While the internet is cringing, scientists have discovered that it's actually legit.

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Over a long time of sharing experiences, people start to mirror each other's habits and body language, but what about the appearance?

One of the factors why some couples look so similar lies at the very beginning when choosing a significant other and is linked to our parents, who we often look like. They say that people tend to look for a partner that looks like their parent of the opposite sex in both behavior and appearance. A study conducted in 2011 by Anthony C. Little, Benedict C. Jones, and Lisa M. DeBruine shows that the most significant factors when it comes to choosing a partner with similarity to parents are hair, eye color, and the age of our parents.

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Back in 1987, researchers suggested that long-term couples start to look more similar over time as a result of decades of shared emotions and common life experiences, but in a recent study conducted this October, Pin Pin Tea-makorn and Michal Kosinski of Stanford University put it to a more detailed test and didn't find that spouses' faces became more similar as time passed. However, they said that couples tend to be similar initially, which is called "assortative mating." Based on many previous studies, researchers said that "long-term romantic partners have been shown to be similar in terms of height, weight, health, diet, age, physical attractiveness, education, ability, intelligence, psychological well-being, personality, attitudes, values, religion, social class, ethnicity, lifestyle, and many other traits."

We hope this explains why some of these couples look suspiciously alike before you jump to conclusions. At the end of the day, this guessing game has become unexpectedly exciting entertainment!

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