What happens when three women, friends since high school days in Dallas, decide to search for old boyfriends decades later? That's the plot of I.O.U. SEX, a novel by Sandra Nachlinger and Sandra Allen.When June, Kiki, and Peggy graduated from high school, all of them were still virgins. After all, they were good girls. Years later, when the three women read June's diary from their senior year, they joke about the sexual frustration they caused their...