When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
40% of people who are rejected in romantic love slip into clinical depression.
72
Yawns are more contagious among people with closer relationships.
163
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
A man is more likely to get a woman's phone number if he is accompanied by a dog.
20
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