Pop quiz: what do earthy actors Peter Sarsgaard and Maggie Gyllenhaal; power hotties Gisele Bundchen and Tom Brady; and Tim Burton-esque duo Vanessa Paradis and Johnny Depp have in common?
As far as facial structure goes, they can all be considered carbon-copy couples - a good thing, says Christina Bloom, founder of the new dating site FindYourFacemate.com.
Launching next week, the site will let users ferret out potential partners who look like them. The inspiration? Ms. Bloom's ex-husband - the two were a spitting image of each other.
"I believe that we are attracted to people who look like us," Ms. Bloom said from New York. "It's a weird thing."
The website uses facial recognition technology to compare nine features of a user's face, including distance between the eyes and the shape of the chin and forehead. After receiving a roster of clones, users can wade through the pool and look for shared values.
Ms. Bloom denies that matchmaking by facial structure negates interracial romance: "Heidi Klum and Seal are perfect for each other. They have the same facial symmetry and they have similar style."
She continues: "Gay people, you tend to see it even more because they're the same sex." She said a recent New York Magazine piece hit the nail on the head with its comparison of fashion designer Marc Jacobs and boyfriend Lorenzo Martone.
Scientific data suggests people like their replicas but offers few clues as to why.
"I believe that it enhances trust because you see yourself in someone else," said Ms. Bloom, adding that some people might be "imprinting their parents."
Although she allows some narcissism may be at play, Ms. Bloom suspects much of the process is unconscious: "You're looking into a face and you don't see yourself in there."
Still, there are plenty of duplicate exes: the angular Keira Knightley and Rupert Friend, plucky Reese Witherspoon and Ryan Philippe, sparkly-eyed Sienna Miller and Jude Law and baby-faced Brad Pitt and Juliette Lewis.
Ultimately, the founder suggests taking her venture at face value: Aesthetic parallels do little besides sparking some chemistry.
"You still have to get along with someone and work at it."
Have you ever dated a "clone" of yourself? Did you consciously seek out a look-alike? Did it work out?