Season 19, Episode 11
Marge recalls to the children of when she went to college as a teen and how Homer resented the idea. He formed a grunge rock group with Lenny, Carl and Lou whilst she fell in love with her college professor.
Although the episode in general is only average it does have some very good one liners;
Homer: "Everything about Marge reminds me of Marge"
Professor (to Marge): "May I kiss your mouth with my mouth?"
Marge: "Just do it already."
*Read a more detailed summary for this episode on Wiki Simpsons