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Plus, “driving a nice car doesn’t say whether you are paying for it, or what you’ve been doing in it or where you’re taking people in the car,” Helen Fisher, chief scientific adviser at Match.com, tells CNBC Make It.

A nice car, a job title and physical fitness may say something about “who you are today,” whereas “a credit score says who you were yesterday, who you were 10 years ago … and who you’re likely to be tomorrow.”

That type of financial responsibility is a “very or extremely important” quality when looking for a partner, according to 69 percent of the survey respondents. Financial responsibility rates higher than sense of humor, attractiveness, ambition, courage and modesty.

When asked to list characteristics of someone with a good credit score, 73 percent of respondents said “responsible,” 40 percent said “trustworthy” and 38 percent said “smart.”

Fisher, a biological anthropologist, explains that, for these reasons, showing someone your credit score can trigger feelings of attachment.

“I think we’ve evolved three distinctly different brain systems for mating and reproduction. Sex drive being one, feelings of intense romantic love being the second, and feelings of deep attachment being the third.

“I would guess that understanding someone’s credit score could really up your feelings of attachment because it elicits feelings of admiration and respect. And that is, by the way, the top thing that singles are looking for, somebody who respects them.”

For millennials, Manfred adds, knowledge is power.

“Regardless of your credit score, one of the keys to improving or maintaining your credit health is simply knowing your score and what the factors are that go into the score,” she says. “If you know what your credit score is, you can either maintain or improve it.”

And improving your credit might help you out when it comes to dating in the future.

“It might not be immediate,” says Fisher. But, at some point, “I can see people flipping out their cellphone and saying, ‘Hey, this is my credit score. What’s yours?'”

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This is an update of a previously published story.