Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Wearing red increases attraction.
30
Intelligent men tend to be more sexually faithful.
31
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
103
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!)
278
Yawns are more contagious among people with closer relationships.
163