'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
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
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
Wearing red increases attraction.
30
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
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