[Solved] Describe the role of the reticular activating system in cortical arousal and stimulation. Erectile Disorder: Erectile Disorder is a sexual dysfunction characterized by the consistent inability to maintain an erection sufficient for satisfactory sexual activity. Sexually Explicit Material: Content that shows sexual acts or arousal intended to stimulate erotic rather than aesthetic or emotional feelings. Desensitization: A process through which an individual becomes less responsive or sensitive to a stimulus after repeated exposure. Sexual Arousal: The physiological and psychological process of becoming sexually stimulated.