Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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Men who kiss their wives in the morning live five years longer than those who don't.
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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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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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'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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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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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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