The skin on your lips is 200 times more sensitive than your fingertips.
345
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
The average sperm cell swims at 8 inches per hour.
4
Ernest Hemingway survived through anthrax, malaria, pneumonia, dysentery, skin cancer, hepatitis, anemia, diabetes, high blood pressure, two plane crashes, a ruptured kidney, a ruptured spleen, a ruptured liver, a crushed vertebra, a fractured skull, and more.
67
Enamel is hardest substance in the human body.
61
The tongue is the strongest muscle in the human body.
50
There are more bacteria in your mouth than there are people in the world.
60
Sitting straight upright in your chair is bad for your back. You should instead slouch at an angle of 135 degrees.
10