'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
Couples' personalities converge over time to make partners more and more similar.
235
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
The average person in their lifetime will spend an estimated 20,160 minutes kissing!
212
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
634
A man's beard grows fastest when he anticipates sex.
239