When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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The average person will go on a date at least 100 times before they finally marry.
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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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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Historically, sweat has been an active ingredient in perfume and love potions.
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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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One in five long-term love relationships began with one or both partners being involved with others.
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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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