Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
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In 2012, a Chinese man named Xiao Fan had a dress made out of 9,999 red roses for his girlfriend and then proposed - 9 in China means forever
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Wearing red increases attraction.
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Yawns are more contagious among people with closer relationships.
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Historically, sweat has been an active ingredient in perfume and love potions.
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Raj from the Big Bang Theory is married to Miss India.
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When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23