An artist's eyesight is getting weak, but she has no insurance and can't afford glasses or contacts. An optometrist who has seen her work offers to trade her glasses if she'll paint a mural for his waiting room. So she spends the weekend painting eyes... of all colors and various sizes, on all four walls of the waiting room. Just eyes, everywhere you look. The doc comes in on Monday, and the artist says, "So what do you think?"
He responds..."I'm glad I'm not a gynecologist." (not original, I know)