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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Kissing an infection-free partner is good for your teeth!
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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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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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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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One in five long-term love relationships began with one or both partners being involved with others.
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When dragonflies mate, their tails form a love heart.
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