The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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One in five long-term love relationships began with one or both partners being involved with others.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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Couples' personalities converge over time to make partners more and more similar.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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