40% of people who are rejected in romantic love slip into clinical depression.
72
Men fall in love faster than women do.
32
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
A man is more likely to get a woman's phone number if he is accompanied by a dog.
20