Bart was born on April 1, 1985, where he lit Homer's tie on fire after ten minutes of being born. His birth date explains his prankster-like behavior. Bart is a self-proclaimed underachiever and prankster who is constantly in detention who in addition to his behavior is easily distracted. His penchant for shocking people began before he was born: Bart "mooned" Dr. Hibbert while he performed a sonogram on Marge when she was pregnant with him, and moments after being born, he set Homer's tie on fire (Marge saying that he could not have done it on purpose because he was only ten minutes old). Bart's first words were "Ay Caramba" after he walked in on Homer and Marge at a bad time