You burn 26 calories in a one minute kiss.
605
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Two in five people in the world marry their first love.
270
8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
212
40% of people who are rejected in romantic love slip into clinical depression.
72
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
