When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The world's shortest man measures only 21.5 inches.
73
On average a woman has 4 sexual partners in her lifetime.
-143
The average sperm cell swims at 8 inches per hour.
4
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
The human sigh acts as a physiological reset button.
23
Pain occurs when sounds are above 130 db.
124