Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Kissing an infection-free partner is good for your teeth!
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Men fall in love faster than women do.
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40% of people who are rejected in romantic love slip into clinical depression.
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You burn 26 calories in a one minute kiss.
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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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Historically, sweat has been an active ingredient in perfume and love potions.
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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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