8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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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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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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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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'X' became symbolic for a kiss because in the middle ages when alot of people were illiterate and they used to sign documents with an X and then kiss it for sincerity.
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A Korean man called Lee Jin-gyu fell in love with his large, huggable pillow and married it.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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