Couples' personalities converge over time to make partners more and more similar.
235
People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
278
'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
255
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
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