Women rate men more attractive if other women are looking and smiling at him.
17
Yawns are more contagious among people with closer relationships.
163
Men fall in love faster than women do.
32
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
69
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165