According to the character's backstory, Bender was purpose built in Tijuana, Mexico (the other characters refer to his "swarthy Latin charm") a reference to bending in Mexican maquiladoras. Viewers are informed, through his own testimony, of Bender's prejudice against non-robots. For example, one of his signature expressions is "kill all humans". Exceptions who are not subject to Bender's prejudicial attitude are those individuals on his "Do Not Kill" list, which seems to comprise only his best friend Philip J. Fry and his colleague Hermes Conrad (added after the episode "Lethal Inspection").