'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
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
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 left ear is more responsive to words of love and emotion whispered into it than the right.
40
A man's beard grows fastest when he anticipates sex.
239
8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
212
When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130