Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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The average person will go on a date at least 100 times before they finally marry.
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40% of people who are rejected in romantic love slip into clinical depression.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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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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Couples' personalities converge over time to make partners more and more similar.
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