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
16
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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The average person will go on a date at least 100 times before they finally marry.
33
Couples' personalities converge over time to make partners more and more similar.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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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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One in five long-term love relationships began with one or both partners being involved with others.
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