'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
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
Couples' personalities converge over time to make partners more and more similar.
235
If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
634
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 typical person spends about 600 hours having sex between the ages of 20 and 70.
234