'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
Wearing red increases attraction.
30
40% of people who are rejected in romantic love slip into clinical depression.
72
Kissing an infection-free partner is good for your teeth!
141
Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
103
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 average person will go on a date at least 100 times before they finally marry.
33