Wearing red increases attraction.
30
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
40% of people who are rejected in romantic love slip into clinical depression.
72
Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
99
Couples' personalities converge over time to make partners more and more similar.
235
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104