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1Sexual arousal•Refer to as “turned on” or “revved up” or “hot” like an energy system•Scientifically - a state of activation of a complex system of reflexes involving sexual organs, hormones & nervous system .–Brain has capacity to create images and fantasies•Other influences: our emotions, level of intimacy between two people and host of othersThe Brain is a sex organ•All behavior controlled by the central nervous system (CNS) –brain & spinal cord•Autonomic nervous system –nerves that carry information from brain and spinal cord to heart, smooth muscle and glandsThe Brain is a sex organ•Autonomic nervous system controls erection–Parasympathetic– “business as usual” including dilating blood vessels entering penis causing in flow of blood –Sympathetic-“fight or flight” emergency response•diminishes erectionSenses and the Brain•Senses (touch, vision, hearing, olfaction (smell) and taste) give information to the CNS•Brain interprets this information•If interpretation is: “sexy”, behavior will change accordingly•Some behaviors are reflexive(erection), some are controlled(approach of partner)Sexual Response & Masters and Johnson•Most famous observers –direct observation research•1957-1965 observed 694 men and women in > 10,000 acts of sexual activity•From data categorized erotic response into 4 stages called Human Sexual Response Cycle (HSRC): Excitement, Plateau, Orgasm, Resolution•Feelings when one wants sexual stimulation or intimacy•Many things stimulate desire… ideas?•Last for a moment or life-time•Hard to define desire & not always connected to the other phases •Exists in minds •A number of sexologists include desire as part of sex response
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