When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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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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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Couples' personalities converge over time to make partners more and more similar.
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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
10
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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