Historically, sweat has been an active ingredient in perfume and love potions.
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In Korea, there's a man named Lee Jin-gyu who fell in love and married his life-sized Japanese body pillow (called a "dakimakura").
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
Couples' personalities converge over time to make partners more and more similar.
235
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.
27
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34