Male Sexual Anatomy and Physiology

1
Male Sexual Anatomy and Physiology

• Chapter 5
• Lecture 6
• Psyc 1633

2
Penis
3
Scrotum
4
Testis
5
Male Internal Structures
6
Erection

• The engorgement of the penis with blood, such
  that the penis grows in size and stiffens.
• capable of erection from birth
• They occur during REM sleep, (every 90 minutes)
• Morning erections - waking during a period of REM
  sleep.
• Paraplegics can attain erection, and ejaculate -
  the sensation of orgasm will not reach the brain.

7
Process of Erection
8
Ejaculation - Emission Phase
9
Ejaculation - Expulsion Phase
10
Penis Size

• symbol of virility
• small flaccid penis usually increases more during
  erection than larger flaccid penis
• research suggests that size is not related to
  sexual satisfaction for either partner
• from what we've learned in class, why might this
  be?

11
Circumcision

• is a religious rite in some cultures
• function of the foreskin is unknown
• mixed information with regards to hygienic value
  and risk for STD's
• medical risks - hemorrhage, infection,
  mutilation, shock, and trauma
• AAP position - neutral stance
• lack of consensus about the role of foreskin and
  sexual satisfaction
• phimosis - when it is difficult to retract the
  foreskin from the glans

12
For Next Class

• Read Chapter 6
• Have you taken the syllabus quiz?
• Be prepared for an in-class journal!