When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Men fall in love faster than women do.
32
Intelligent men tend to be more sexually faithful.
31
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
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
Yawns are more contagious among people with closer relationships.
163