As a rule, 66 percent of people keep their eyes closed while kissing. The rest take pleasure in watching the emotions run the gamut on the faces of their partners.
Historically, sweat has been an active ingredient in perfume and love potions.
People are more likely to tilt their heads to the right when kissing instead of the left (65 percent of people go to the right!)
8 out of 10 people think that the first kiss indicates how the rest of the relationship will be.
One in five long-term love relationships began with one or both partners being involved with others.
Yawns are more contagious among people with closer relationships.
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.