40% of people who are rejected in romantic love slip into clinical depression.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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Two in five people in the world marry their first love.
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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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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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