Wearing red increases attraction.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Parents receive 1 out of every 5 Valentines.
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When dragonflies mate, their tails form a love heart.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Men fall in love faster than women do.
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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13