Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Yawns are more contagious among people with closer relationships.
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As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
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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
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
69
Anuptaphobia is the fear of staying single.
11