This thesis takes up J. G. Ballard's contention, that 'the act of intercourse is now always a model for something else,' to show that Don DeLillo uses a particular sexual, cultural economy of adultery, understood in its many loaded cultural and literary contexts, as a model for semantic reproduction. I contend that DeLillo's fiction evinces a promiscuous model of language that structurally reflects the myth of the adulterous triangle. The thesis makes a significant intervention into DeLillo scholarship by challenging Paul Maltby's suggestion that DeLillo's linguistic model is Romantic and pure. My analysis of the narrative operations of adultery in his work reveals the alternative promiscuous model. I discuss ten DeLillo novels and one play...