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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40% of people who are rejected in romantic love slip into clinical depression.
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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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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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There's a love mattress that is specifically designed for couples who sleep on each other's arms.
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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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