You burn 26 calories in a one minute kiss.
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
130
In medieval Italy, if a man was caught kissing a woman in public, he had to marry her whether he liked it or not.
456
Couples' personalities converge over time to make partners more and more similar.
235
When dragonflies mate, their tails form a love heart.
22
The average person in their lifetime will spend an estimated 20,160 minutes kissing!
212
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
The typical person spends about 600 hours having sex between the ages of 20 and 70.
234