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
The Nutty Professor (character) life, disposing of most of the serum and 'fighting' Buddy for control of the body before Buddy can drink enough of the last samples of the serum to eliminate Klump forever. At the conclusion, Klump admits what has happened to the faculty staff after he transforms back to normal in public, concluding that he must learn to accept himself as he is. In the second movie Klump's kind personality is polluted by the Buddy Love gene in his DNA, causing him to occasionally say offensive or insulting things to people without realizing, especially when talking to his new love interest