Couples' personalities converge over time to make partners more and more similar.
235
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Wearing red increases attraction.
30
When dragonflies mate, their tails form a love heart.
22
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
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26