When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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The average person will go on a date at least 100 times before they finally marry.
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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Kissing an infection-free partner is good for your teeth!
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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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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