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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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
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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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Parents receive 1 out of every 5 Valentines.
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