I read a short story once (I don't know when) about wishes, or at least I think it was wishes, involving a man and a woman. The man ended up with an eye on his figure and tongue I think, or perhaps it was a small man in the persons mouth. At one point the eye-on-the-finger is used to see man in the mouth.
I'm sorry I have so little to go on, it was a long time ago that I read the story. I hope this enough to go on. It may have been a kid's story.