There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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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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Wearing red increases attraction.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
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