[Solved] Kevin is four years old and is learning to use language and other symbols.What stage of development has Kevin achieved? A)preoperational stage B)preparatory stage C)formal operational stage D)play stage Frotteur: is an individual who derives sexual pleasure from rubbing against non-consenting people, often in crowded public places. Pedophilia: A psychiatric disorder characterized by an adult having sexual fantasies, urges, or behaviors towards prepubescent children. Diagnosing: The process of identifying a disease or condition based on its signs and symptoms through examination and tests. Autoerotic Asphyxia: A dangerous sexual practice involving self-induced suffocation to heighten pleasure during masturbation.