The Cosby Show - "This is your penis." Remember this scene?

Does anyone else recall an episode of "The Cosby Show" that ended with Cliff and Theo in the back yard grilling - Theo said something sarcastic, and Cliff picked up a small, charred piece of something and said, "This is your penis." - ? If you remember this, can you tell me what else happened this episode, or even the name of it if you know? No one believes me that this scene exists.