That’s ridiculous, but, cheerfully and unabashedly, so is “I Want Your Sex.” The verbal and visual building blocks of Araki’s comedy—quick-witted one-liners, exuberant sex scenes, sartorial gags, garish décor—express a dazzling, totalizing sense of optimism. His surreal, harrowing “Nowhere” (1997) featured characters named Dark, Lucifer, Egg, Jujyfruit, and Handjob. When she tells Elliot that “sex is everything,” she might as well be articulating Araki’s own mission statement. The end of the world remains, for him, a potent metaphor for the cataclysmically unstable nature of youthful sexual discovery.