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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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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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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The single biggest predictor of love is proximity.
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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 left ear is more responsive to words of love and emotion whispered into it than the right.
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Twenty nine percent of women spend more time shopping for shoes than they do looking for a life long mate.
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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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