[Solved] Systems thinking develops theories about human behavior based on scientific methods and study. Erotic Plasticity: The degree to which an individual's sex drive and erotic preferences may be shaped or altered by environmental, situational, and cultural factors. Father-Absent Families: Describes family situations where the father is physically absent from the household, impacting family dynamics and child development. Sexually Promiscuous: Exhibiting or characterized by involvement in a variety of sexual relationships with little or no emotional commitment. Contraceptives: Methods or devices used to prevent pregnancy.