Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Men fall in love faster than women do.
32
The typical person spends about 600 hours having sex between the ages of 20 and 70.
234
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
40% of people who are rejected in romantic love slip into clinical depression.
72
You burn 26 calories in a one minute kiss.
605
Historically, sweat has been an active ingredient in perfume and love potions.
309