3x2 - Maniac Mansion

Lenny comes to visit, and is really depressed. He feels he must prove his love to Terri, and decides to return to boxing. So he loses weight and starts to train. He eventually gets a fight lined up with a boxer named Maddog Mustafa Musthead. Halfway through the fight, Lenny reveals to Maddog the real reason he's fighting. Maddog tells him that he doesn't have to prove his love, and that he possesses everything necessary for a good relationship.