Men who kiss their wives in the morning live five years longer than those who don't.
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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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Historically, sweat has been an active ingredient in perfume and love potions.
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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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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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In Korea, if you do not receive any gift on Valentine's day then all the singles go to Korean restaurants and eat black noodles to celebrate (or mourn) their single status.
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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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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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