Yawns are more contagious among people with closer relationships.
163
Historically, sweat has been an active ingredient in perfume and love potions.
309
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
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
Holding hands with someone you love can alleviate physical pain as well as stress and fear.
26
Men fall in love faster than women do.
32
A man is more likely to get a woman's phone number if he is accompanied by a dog.
20