Yawns are more contagious among people with closer relationships.
163
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
A man is more likely to get a woman's phone number if he is accompanied by a dog.
20
One in five long-term love relationships began with one or both partners being involved with others.
177
Intelligent men tend to be more sexually faithful.
31
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
69
40% of people who are rejected in romantic love slip into clinical depression.
72