[Solved] Which of the following is an example of a normative age-graded influence on development? A) entering kindergarten B) living during the 9/11 attacks C) winning the lottery D) becoming addicted to methamphetamine Sensate Focus: A sex-therapy exercise in which partners take turns pleasuring each other with guided verbal feedback and in which certain kinds of stimulation are temporarily forbidden. Autoerotic Zone: Areas of the body that provide sexual pleasure when stimulated, a concept often discussed in psychoanalytic theories of sexual development. Refractory Period: The period of time immediately following an action potential during which a neuron or muscle is incapable of generating another action potential. Sexual Response Cycle: A series of emotional and physical phases experienced during sexual activity, which include excitement, plateau, orgasm, and resolution stages.