Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Wearing red increases attraction.
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Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
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As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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Kissing an infection-free partner is good for your teeth!
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
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