[Solved] Which method of achieving an erection is least likely to require the brain's involvement? A) REM sleep B) Looking at pornography C) Watching an erotic movie D) Tactile stimulation of the penis E) Voluntary contraction of pelvic floor muscles Conditions of Worth: Carl Rogers' concept referring to the standards imposed on an individual by others and by themselves, which are believed to be necessary to earn positive regard. Fully Functioning Person: A term used by Carl Rogers to describe an individual who is living in harmony with their deepest feelings and impulses, exhibiting features such as openness to experience, trust in self, and a sense of inner freedom. Actualization Tendency: A concept in psychology referring to the inherent inclination of all human beings to grow, develop, and realize their fullest potential. Environmental Forces: Elements such as climate, geography, natural resources, and social factors that can influence the development of societies, individual behavior, and biological ecosystems.