Men who kiss their wives in the morning live five years longer than those who don't.
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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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Raj from the Big Bang Theory is married to Miss India.
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The single biggest predictor of love is proximity.
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In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
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Historically, sweat has been an active ingredient in perfume and love potions.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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