Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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You burn 26 calories in a one minute kiss.
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One in five long-term love relationships began with one or both partners being involved with others.
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Historically, sweat has been an active ingredient in perfume and love potions.
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When someone looks at a new love, the neural circuits that are usually associated with social judgment are suppressed.
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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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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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