A man's beard grows fastest when he anticipates sex.
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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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When dragonflies mate, their tails form a love heart.
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The single biggest predictor of love is proximity.
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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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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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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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