Couples' personalities converge over time to make partners more and more similar.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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When dragonflies mate, their tails form a love heart.
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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