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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Yawns are more contagious among people with closer relationships.
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Women who play video games tend to have more sex and be happier with their relationships than those 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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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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Raj from the Big Bang Theory is married to Miss India.
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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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