Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Men who kiss their wives in the morning live five years longer than those who don't.
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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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A poll has found that computer 'nerds' make the best lovers, with 82 percent of IT geeks claiming they put their partner's pleasure above their own.
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