(There is some evidence to suggest that this animosity was exacerbated by the baron's sexual attraction to Paul.) It was this ingrained hatred that goaded Feyd-Rautha to challenge Paul to a duel following the emotionally charged confrontation between Paul and Emperor Shaddam IV upon the emperor's attempted takeover of the planet Arrakis. Both young men had been trained intensively in various methods of combat, with Feyd-Rautha additionally trained to be ruthless and to take advantage of every trick available. Paul had bees taught to be aware of the tricks, but this sense of integrity would not allow him to use any.