Looking for a more effective joke expressed in language.

There was an old man with a very long beard that covered his mouth, as if he had no mouth. One day, he went for a walk in the park. Two female college students saw it and said, "Look, this old man has no mouth." Several children nearby heard it and thought that the old man had no mouth, so they shouted: "This old man has no mouth." The old man has no mouth!" The old man was not happy when he heard this, so he lifted his beard and pointed at his mouth with his other hand. "What a bastard!"