The Nutty Professor (character) recently fallen in love with grad student and chemistry teacher Carla Purty (Jada Pinkett Smith), Klump uses his latest discovery, a weight-loss serum that rewrites the subject's genes, to lose weight in order to spend time with her. Unfortunately, this serum creates the confident but mean-spirited individual known as Buddy Love, due to the testosterone imbalance caused by the transformation causing Buddy to manifest as an independent personality. When Klump's student and assistant Jason learns what has happened, he realizes that Buddy is gaining increasingly greater freedom from the professor's influence. This encourages Klump to take back control of his
Professor Frink in "Old Money", since he was trying to secure funding for a death ray. When Azaria ad-libbed a voice for the character, he did an impression of Jerry Lewis's Julius Kelp character from "The Nutty Professor". The staff liked the voice and therefore changed Frink to be more like Julius Kelp, both in appearance and personalityhe became more nerdy, and went from evil to just mad. Lewis later guest-starred on the show as Frink's father in the 2003 episode "Treehouse of Horror XIV". The professor has received acclaim from critics, particularly for his bizarre inventions such as the hamburger earmuffs,