Couples' personalities converge over time to make partners more and more similar.
235
Two in five people in the world marry their first love.
270
Men who kiss their wives in the morning live five years longer than those who don't.
1k
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
A man's beard grows fastest when he anticipates sex.
239
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
69
The typical person spends about 600 hours having sex between the ages of 20 and 70.
234