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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8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
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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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Couples' personalities converge over time to make partners more and more similar.
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When you fall in love, that 'high' feeling is caused by a flood of dopamine that is similar to that of cocaine.
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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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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
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Parents receive 1 out of every 5 Valentines.
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