Part 2 of "Science & Sexuality." The most important sex organ is between your ears! The hypothalamus is an ancient brain area governing instinctive drives and behaviors. People are animals and sex is more ancient than people!

1. The Sexual Brain

2. The Hypothalamus Integration of Neuroendocrine Activity and Genesis of Instinctive Drives & Behavior Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

3. Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

4. Hypothalamic Functions: Homeostasis and Instinctive Drives & Behavior Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

5. Hypothalamus – Pituitary – Gonad Intercommunication Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

6. Menstrual Cycle Is Orchestrated by Hypothalamus Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

7. Cyclic Ovarian Secretion Men: Estradiol = 50 ug/d, Testosterone = 4000-9000 ug/d Ganong, William F. REVIEW OF MEDICAL PHYSIOLOGY 22 nd ed. Lange Medical Books/McGraw-Hill (2005)

12. Hypothalamus & Limbic System: Genesis of Emotions & Emotional Expression Netter, Frank H. The CIBA COLLECTION OF MEDICAL ILLUSTRATIONS. Vol I. Nervous System. Part I. Anatomy & Physiology. New York: CIBA (1983)