They don't have enough features on the human or animal side to make them visually interesting, so they look boring and creepy.
That is funny.I've got a pretty good feel now for which places are and aren't safe, thankfully.
Also, "I know you like colored horses" is a pretty funny phrase. If you read it in the same tone of voice as you might read "I know where you hid the bodies" it becomes even funnier.