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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When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
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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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Historically, sweat has been an active ingredient in perfume and love potions.
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People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
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Intelligent men tend to be more sexually faithful.
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Yawns are more contagious among people with closer relationships.
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