Couples' personalities converge over time to make partners more and more similar.
235
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
40% of people who are rejected in romantic love slip into clinical depression.
72
Men who kiss their wives in the morning live five years longer than those who don't.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
212
The single biggest predictor of love is proximity.
30
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
