When dragonflies mate, their tails form a love heart.
22
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Kissing an infection-free partner is good for your teeth!
141
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
Wearing red increases attraction.
30
A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10