[Solved] Which of the following is a primary reinforcer? A) food B) money C) pain D) gold stars View Pornography: The act of looking at or watching explicit sexual material, typically intended to stimulate erotic rather than aesthetic or emotional feelings. Evolutionary Perspective: A theoretical approach that explains various aspects of human nature as a result of the process of evolution by natural selection, highlighting the adaptive value of behaviors and physical traits. Youthful Fertility: The ability or capacity of young individuals, typically in their teens and twenties, to reproduce or produce offspring. Testosterone: A steroid hormone that stimulates development of male secondary sexual characteristics, produced mainly in the testes and also in the ovaries and adrenal cortex.