I've read that before, and I did try to lick my elbow the first time.
BUT I do have some qualms about some of these:
It is possible to lead a cow upstairs...but not downstairs.
** Yes it is.
Turtles can breathe through their butts
** That isn't entirely true. Most turtles can not breathe through the backs of their bodies, but a presumed-extinct species can:
Elephants are the only animals that can't jump.
** Since when can earthworms jump?