You burn 26 calories in a one minute kiss.
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Historically, sweat has been an active ingredient in perfume and love potions.
309
When dragonflies mate, their tails form a love heart.
22
Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
14
Kissing an infection-free partner is good for your teeth!
141
8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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