Writers sometimes get in trouble for mining their own lives--searching for material. I've had this problem. I suspect that Greg Daniels has struggled with this issue, as well--and so we have "Secrets of a Successful Marriage." Having experienced a personal crisis, Homer tries to regain self-confidence by becoming a teacher. He will coach his neighbors on "communication strategies"--because, after all, he has stayed married for several years. Homer finds that he has nothing to say. Except--casually--he admits that Marge dyes her hair. (A wonderful detail.) Having noticed a surge of interest, Homer continues. Marge likes to engage in "elbow-nibbling" during foreplay. Soon enough, Homer is inviting the students to a Simpson family dinner; students can witness juicy conflicts even as they are just starting to take shape. Marge is understandably furious. I think the resolution of the story is fine, but what really captivates me is Homer's descent int...