Men fall in love faster than women do.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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Couples' personalities converge over time to make partners more and more similar.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
4
Erotomania is a type of delusion in which the person believes another person is in love with him/her.
38
The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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