Extroverts must swim constantly: if they stop, they will suffocate.
Introverts never have to drink water. They can get all the water they need from reading books.
According to the principles of aerodynamics, extroverts should be incapable of flight. However, no one ever told extroverts this. Well actually they tried, but the extroverts didn’t listen.
What is commonly referred to as the introvert’s “second brain” is actually a walnut-sized cluster of neurons at the base of the spine. It exchanges information with the introvert’s true brain, but the neural impulses travel slowly. If you step on an introvert’s tail, it can take as long as half an hour before the introvert complains on Tumblr.
A group of extroverts is called a “parliament.”
No two introverts have the same markings.
Despite their reputation, extroverts will generally only bite if provoked.
As their teeth never stop growing, introverts must gnaw constantly to wear their dentition down to a functional length.
There are about 25 million extroverts for each introvert. Or at least it seems like it.
Introverts don’t really change color in order to blend in with the background. Their color changes actually relate more to their moods and their activities, as when fighting, fleeing, or attempting to mate.
Despite the urban legend, eating uncooked rice does not cause an extrovert’s stomach to explode.
Slowly closing your eyes and then opening them again means “I love you” in Introvert.
An extrovert’s quack does not echo.
Introvert hair is made of keratin, the same proteinaceous material that makes up your horn if you’re a rhino.
Extroverts can keep talking for as long as two hours after their heads are chopped off.
The common introvert can see in near-complete darkness if he or she can find the light switch.
An extrovert placed into a pot of boiling water will jump out immediately. However, if you place an extrovert in a pot of lukewarm water and slowly turn up the temperature until the water reaches the boiling point, he or she will just keep texting.
Reclusicanthropus giganticus, the largest known fossil introvert, had a couch 22 feet long.
Extroverts are native to all continents except Antarctica, but they’re starting to show up there too.
Introverts can slam their heads into solid wood at rates up to 20 times per second, but are protected from impact trauma by a sponge-filled, shock-absorbing sinus cavity… no wait, that’s woodpeckers.