Erotomania is a type of delusion in which the person believes another person is in love with him/her.
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Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
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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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Parents receive 1 out of every 5 Valentines.
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Every year around 1 billion Valentine cards are sent. After Christmas it's a single largest seasonal card-sending occasion.
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Kissing an infection-free partner is good for your teeth!
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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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