One night Bart Simpson sneakily entered Milhouse's house to try and steal his underwear. However, he was caught by Luann, who smiled and let him steal them. Later that night, they became lovers and

. The next morning, Lisa wakes up and notices Bart and Luann together. She is shocked and confused and quickly runs to tell Marge and Homer. Marge is outraged and confronts Bart and Luann. Marge tries to explain to Bart that even though he may feel something for Luann, he is much too young to be involved with her. Homer still doesn't quite understand the situation and tries to make jokes about the situation, which only adds to the tension in the room. Luann tries to explain herself but Marge just yells at her and tells her to leave the house. Bart is embarrassed and feeling guilty for what happened. However, Luann is thankful for the experience and tells Marge and Homer how happy she is that Bart was able to take a chance on her. Marge and Homer realize that even though Bart is young, he is capable of understanding the complexities of relationships, even if they don't always lead to the right decision. Marge and Homer express their concerns to Bart but ultimately tell him that they understand and they still love him no matter what. Bart and Luann go on to date for a few months, until their age difference eventually drives them apart. The experience has a lasting impact on Bart and he grows more mature and responsible over time. Marge and Homer feel grateful that Luann gave Bart the chance to experience a relationship and learn lessons that will help him grow into an even better person.