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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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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Parents receive 1 out of every 5 Valentines.
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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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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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In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
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