When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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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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The single biggest predictor of love is proximity.
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Kissing an infection-free partner is good for your teeth!
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
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If you mouth the word "colorful" to someone, it looks like you are saying "I love you".
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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