[Solved] Large hailstones hit the ground with speeds exceeding 100 mph. Masturbation: The act of self-stimulation of one's own genitalia, frequently leading to climax. Krafft-Ebing: refers to Richard von Krafft-Ebing, a 19th-century psychiatrist and author known for his research in human sexuality. Human Sexuality: An area of study and aspect of human life that encompasses sex, gender identities and roles, sexual orientation, eroticism, pleasure, intimacy, and reproduction. Clinical Research Method: A systematic approach used in medical and psychological research that involves the collection and analysis of data to study diseases, treatments, and health outcomes.