'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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Historically, sweat has been an active ingredient in perfume and love potions.
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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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Cuddling (or other ‘love’ acts) helps to heal physical wounds faster due to the release of Oxytocin which is proven to reduce swelling.
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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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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Speed dating was invented by a Rabbi in 1999.
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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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