PSY E111 Lecture Notes - Lecture 24: Human Sexual Activity, Scrotum, Psy
Document Summary
Phase 1: excitement: can last from 1 minute to several hours; pulse increase, blood pressure rise, breathing quickly, rosy flushed skin (chests or breast area); nipples harden and become more erect. Women: clitoris swells; lips of the vagina open; vaganal walls moisten. Men: penis becomes erect; testes pull up; skin of scrotum tightens. Women: vagina swells due to increased amount of blood; outer lips. Men: penis becomes more erect (may release a few drops of fluid become redder (second several minutes) Phase 3: orgasm: muscular contractions; shortest of the phases. Phase 4: resolution: return to a steady state equilibrium. Refractory period: period of time where men cannot achieve another erection (several minutes several hours) Survey: results nearly half men; <20% women reported having bisexual experiences. Janus report: dr. samuel s. janus + dr. cynthia l. janus published the results of the first large scale study of human sexual behaviour since those of kinsley.
