Historically, sweat has been an active ingredient in perfume and love potions.
309
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
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
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
Men fall in love faster than women do.
32