In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
Couples' personalities converge over time to make partners more and more similar.
235
For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
41
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
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When dragonflies mate, their tails form a love heart.
22