Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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Kissing an infection-free partner is good for your teeth!
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Two in five people in the world marry their first love.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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Studies show that the risk of a “secret love” being revealed heightens romantic feelings for the partners, thanks to increased levels of phenylethylamine (PEA).
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Historically, sweat has been an active ingredient in perfume and love potions.
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