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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Kissing an infection-free partner is good for your teeth!
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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In 1999, a fisherman found a love letter in a bottle from a soldier in WWI. He returned said letter to the now deceased widows 86 year old daughter.
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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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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
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40% of people who are rejected in romantic love slip into clinical depression.
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