According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
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Historically, sweat has been an active ingredient in perfume and love potions.
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Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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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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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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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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