Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252
You can't tickle yourself.
29
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
The average person's skin weighs twice as much as their brain.
131
The human body contains over a billion miles of DNA.
147
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22