Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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A man's beard grows fastest when he anticipates sex.
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Historically, sweat has been an active ingredient in perfume and love potions.
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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Men fall in love faster than women do.
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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