Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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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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When dragonflies mate, their tails form a love heart.
22
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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