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Lou Rawls guest stars in an episode that takes a lighthearted look at a serious problem: colon cancer. Rawls appears as a singing doctor in a sequence in which Michael "previews" his colonoscopy the night before he has it. Getting him there is not easy. "What is it with men?" Janet fumes. "You take better care of your cars than you do of your bodies." That doesn't make him bend. What does is the thought of not being there for his kids.