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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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Historically, sweat has been an active ingredient in perfume and love potions.
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The single biggest predictor of love is proximity.
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Wearing red increases attraction.
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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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Close to 110 million roses (mostly red) will be purchased and delivered around Valentine's Day in the U.S.
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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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