THE FORCES OF ATTRACTION: From polar opposites to twins marrying twins, can biologists explain the mysteries of why we love whom we love? - Document (2024)

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Author: Jennifer Latson

Date: March-April 2019

From: Psychology Today(Vol. 52, Issue 2)

Publisher: Sussex Publishers, Inc.

Document Type: Article

Length: 4,008 words

Lexile Measure: 1210L

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THERE'S A SCIENCE BEHIND attraction, one that can be more complicated than physics--and significantly more awkward. Albert Einstein knew this better than anyone. In his thirties, Einstein grew so enamored of his cousin Elsa that he left his first wife for her. He and Elsa were twice related, since their mothers were sisters and their fathers were first cousins. The physicist wrote to his familial flame in a 1014 letter, "Dear little Else, I shall cherish you and be thankful for your love. You have proven that you felt attracted to me as a person and not to the great animal in the newspapers.

A few years later, however, he was ready to call off their engagement. Instead, he professed his love to yet another relative: Elsa's 20-year-old daughter, Ilse. "Albert himself is refusing to take any decision; he is prepared to marry either Mama or me," Ilse wrote to a friend. "I know that A. loves me very much, perhaps more than any other man ever will, he also told me so himself yesterday."

Einstein reverted to Plan A the following year and married Use's mother.

It might seem like baffling behavior for a man of his intellectual stature, but it makes perfect sense to evolutionary biologists. From kissing cousins to May-December relationships, from partners who look alike to those who seem entirely mismatched, the forces of attraction can appear random, arbitrary, and inexplicable. But they seem mysterious only because they operate on a primal plane, beneath our conscious awareness. Even the most unusual couplings are based, at some level, on an evolutionary calculus that has emerged over millennia.

I LIKE YOU. YOU'RE LIKE ME

Like all animals, we're drawn to partners who resemble us. It's part of a phenomenon biologists call assortative mating: Animals with similar traits mate with each other at rates that cannot be explained by chance. It's why Japanese common toads prefer toads of the same size, and why snow geese, which can be either blue or white, tend to pick a partner of the same color.

Many human couples look alike, too-in some cases, strikingly so.

Holly and Adam Anderson, for example, share the same blue eyes and blonde hair, with such similar facial shapes and features that they could pass as siblings if you didn't know they were married. They met in college. For Adam, it was love at first sight: He called his mother that night and told her he'd met the woman he wanted to marry. Holly took a little longer to reach that point, but not by much.

"I was surprised at how comfortable I was with him. Even when I'd technically just met him, I felt as though I'd known him a long time," she says. They were engaged within two months.

Their shared aspirations won Holly over, she says, along with an entrepreneurial spirit they'd both had since childhood. At 5, she made coloring books, selling them to her friends; in high school, she sewed and sold denim...

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THE FORCES OF ATTRACTION: From polar opposites to twins marrying twins, can biologists explain the mysteries of why we love whom we love? - Document (2024)

FAQs

Are twins attracted to the same person? ›

"It's very surprising, because identical twins tend to have similar tastes, similar preferences-similar friends even, but they tend to choose very different spouses," Segal says. As a whole, twin studies confirm that attraction is subtle and hard to pinpoint--and that it's different for everyone.

How does the study of twins help us understand the nature-nurture controversy with respect to intelligence better? ›

The studies of reared-apart twins have shown that in general, half the differences in personality and religiosity are genetically determined, but for a trait like I.Q., about 75 percent of the variation, on average, is genetic, with only 25 percent influenced by the environment.

Can twins really feel what the other is feeling? ›

Twins do make similar life choices and evince similar quirks due to the genetics of complex traits; genes contribute to everything from food preferences to choice of profession. However, there is no demonstrable evidence that twins can communicate telepathically or sense events in each other's lives.

Why do twins have a special bond? ›

It all starts in the womb.

The first real interaction of every person initiates right after birth. One of the reasons why twins are so close (and different from everyone) is because their bond is established way before, during pregnancy. It can be seen as early as 15 weeks after gestation, through ultrasound.

Can twins be attached to each other? ›

Conjoined twins may be joined at one of several places. These conjoined twins are joined at the chest (thoracopagus). They have separate hearts but share other organs. Conjoined twins are two babies who are born physically connected to each other.

Am I more likely to have twins if my boyfriend is a twin? ›

Even though researchers haven't pinpointed the cause, some people are at an increased likelihood of having twins. According to The American Society for Reproductive Medicine, women who are fraternal twins have a 1 in 60 chance of having twins, and men who are fraternal twins have a 1 in 125 chance of fathering twins.

Why do scientists use studies of twins to learn about human characteristics? ›

Advantages of twin studies

Twin studies allow disentanglement of the shared genetic and environmental factors for the trait of interest. Researchers can estimate the proportion of variance in a trait attributable to genetic variation versus the proportion that is due to shared environment or unshared environment.

What is an example of how twins can be studied to determine the impact of nature? ›

Twin studies uncover genetic and environmental contributions

For example, when just one twin gets a disease, researchers can look for elements in the twins' environments that are different. Or when both twins get a disease, researchers can look for genetic elements shared among similar twin pairs.

How does studying twins help psychology better understand human behavior? ›

The special relationship between twins allows researchers to examine the differences between genetic and environmental influences over both physical and mental health, as well as traits and behaviors. By studying twins, we can learn a lot about diseases, disorders, and human nature in general.

Do twins feel pain? ›

Many experiments over the years have failed to prove that twins feel each other's pain.

Is twin telepathy real? ›

Twin telepathy is mostly like a myth, according to Nancy Segal, PhD, a psychology professor, leading expert in the psychology of twinhood, and author of nine books about twins. Dr. Segal says many twins she's spoken to have never experienced any sort of telepathy.

Can you sense being pregnant with twins? ›

Women who are expecting twins may have more severe pregnancy symptoms such as fatigue, nausea, and breast tenderness. During a twin pregnancy, you'll likely gain weight faster and start showing sooner.

What is the rarest twin? ›

Monoamniotic-monochorionic Twins

These types of twins share a chorion, placenta, and an amniotic sac. This is the rarest type of twin, and it means a riskier pregnancy as the babies can get tangled in their own umbilical cords.

Can an identical twin be a boy and a girl? ›

Identical twins can be different sexes due to a phenomenon called gonadal dysgenesis, where mutations or changes occur in the genes that determine the development of genitalia,” says Dr. Andrews. Normally, gonadal development leads to both babies either having testes (boys) or ovaries (girls).

Why do twins sleep together? ›

This is called co-bedding and is perfectly safe. In fact, putting twins in the same cot can help them regulate their body temperatures and sleep cycles, and can soothe them and their twin.

Do twins have the same crushes? ›

This tells us that, while identical twins have the same genes, they don't necessarily have the same sexual attractions.

What is a twin flame connection? ›

A “twin flame” is a New Age concept that describes a certain intense connection between two individuals who are supposedly “two halves of one whole.” “Twin flame” is not a recognized clinical term, although so-called twin flame relationships can often be described using modern relationship terms.

Why is it hard to date a twin? ›

Identical twins are still unique individuals and their interests, tastes, and hobbies may be very different from one another. As well, not all twins get along, or have an intense level of closeness, in just the same way that some single birth siblings don't get along well.

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