Yawns are more contagious among people with closer relationships.
163
Intelligent men tend to be more sexually faithful.
31
Women rate men more attractive if other women are looking and smiling at him.
17
According to the New York Times, a study conducted during the 1980's found that men who kiss their wives before leaving for work live longer, get into fewer car accidents, and have a higher income than married men who don't.
14
Wearing red increases attraction.
30
Women who play video games tend to have more sex and be happier with their relationships than those who don’t.
18
Anuptaphobia is the fear of staying single.
11