Women rate men more attractive if other women are looking and smiling at him.
17
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
69
Yawns are more contagious among people with closer relationships.
163
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
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
16
8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
212
One in five long-term love relationships began with one or both partners being involved with others.
177
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13