"Stealing First Base" is the fifteenth episode of the twenty-first season of the American animated television series The Simpsons. It originally aired on the Fox network in the United States on March 21, 2010. In this episode, Bart falls in love with a girl named Nikki from a second fourth-grade class, but when he kisses her, Nikki begins treating Bart like dirt. Meanwhile, First Lady Michelle Obama teaches Lisa that there is no shame in being an overachiever, and Nelson Muntz teaches a blind boy how to be a schoolyard bully.