LA yuppie Marty (writer-director Binder) can't stop wondering how exciting the bedroom would be if wife Laura (Hemingway) acts out what the script calls the ultimate male fantasy - getting it on, lesbian style, with an attractive woman in Marty's presence. Reluctant Laura complies, and enjoys the feeling so much that the "sex monster" in her awakens. Even the randy husband is appalled, as Laura compulsively makes love with just about all the wives and businesswomen Marty knows. Though the plot sounds like porn, this is the sort of coy sex comedy in which sex is never clearly shown. Even nudity is fleeting. You're supposed to find Marty's wish-fulfillment plight funny by itself. Hmmm... Male characters in THE SEX MONSTER at least answer the question, what would those obnoxious guys from teen-sex comedies of the 80s be like if they grew up to be rich breadwinners in antiseptic LA mansions' For edgier comedy about American couples uneasily experimenting with intimacy, check out the trendsetting BOB & CAROL & TED & ALICE.
Marty Barnes, a neurotic building contractor (Binder), convinces his reluctant wife Laura (Hemingway) to engage in a menage-a-trois with another woman. Things go horribly awry for him when he discovers that the experience has only wet her appetite for more, including Marty's secretary! Marty learns the powerful lesson that one should be careful what one wishes for, while trying to keep his wife in line at the same time.