1) No-one in the entire world can touch all their own teeth with their tongue.
2) Mad people everywhere are now trying this.
4) You've just tried, and discovered this to be untrue.
5) Now you're sitting there with a crazed smile on your face.
5) Bet you didn't notice that I'd skipped number 3!
6) And now you've gone back to check.
7) Bet you didn't notice that I'd skipped number 6 either.
8) Fooled again...
9) Bet you didn't notice that number 5 appears twice!
10) Now that hopefully you've got a smile on your face, remember that that's what it's all about, and go back to your daily chores...