Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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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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Raj from the Big Bang Theory is married to Miss India.
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One in five long-term love relationships began with one or both partners being involved with others.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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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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Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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The left ear is more responsive to words of love and emotion whispered into it than the right.
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