'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
Parents receive 1 out of every 5 Valentines.
20
The average person in their lifetime will spend an estimated 20,160 minutes kissing!
212
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").
-2
Wearing red increases attraction.
30
Kissing an infection-free partner is good for your teeth!
141
Couples' personalities converge over time to make partners more and more similar.
235
You burn 26 calories in a one minute kiss.
605