what episode was the joke used on/in?

"Let's face it, the human body is like a condominium apartment. The thing that keeps you from really enjoying it is the maintenance. There's a tremendous amount of daily, weekly, monthly, and yearly work that has to be done. From showering to open heart surgery, we're always doing something to ourselves. If your body was a car, you wouldn't buy it. You'd go, 'Nah, I've heard about these human being bodies. This is one of those Earth models, right? Yeah, a cousin of mine had one. Too much work to keep them going. The new ones are nice looking, though."