some more facts funny

1. Eleven percent of women have gone online and done research on a person they were dating or were about to meet, versus seven percent of men. 
2. . Couples' personalities converge over time to make partners more and more similar.
3. The oldest known love song was written 4,000 years ago and comes from an area between the Tigris and Euphrates Rivers. 
4. The tradition of the diamond engagement ring comes from Archduke Maximillian of Austria who, in the 15th century, gave a diamond ring to his fiancée, Mary of Burgundy. 
5.  Forty-three percent of women prefer their partners never sign "love" to a card unless they are ready for commitment. 
6. People who are newly in love produce decreased levels of the hormone serotonin — as low as levels seen in people with obsessive-compulsive disorder. Perhaps that's why it's so easy to feel obsessed when you're smitten. 
7.  Philadelphia International Airport finished as the No. 1 best airport for making a love connection, according to an online survey. 
8. According to mathematical theory, we should date a dozen people before choosing a long-term partner; that provides the best chance that you'll make a love match. 
9. . A man's beard grows fastest when he anticipates sex
10.  Every Valentine's Day, Verona, the Italian city where Shakespeare's play Romeo and Juliet took place, receives around 1,000 letters addressed to Juliet.