What's Love Got to Do With It?

Copyright 2001 David A. Wheeler, Ph.D., PHR, CMT NoStress@mail.com   Last updated 10/11/05 04:11 PM

File: sex.htm

Genetic Sex: Genotype

  • XX Female
  • XY Male
  • XXX Female
  • XXY Male
  • XYY Male
  • XO Female
  • YO Dead Male

Sex: Biological Differences between men and women

  • Male
  • Hermaphrodite
  • Female

Gender: Cultural differences between men and women. What culture expects them to do.

  • Masculine
  • Androgynous
  • Feminine

Sexual Response Cycle (Masters and Johnson)
Excitement, Plateau, Orgasm, Resolution

  1. Excitement-
    • Vasocongestion
    • 30 sec - 1 min men
    • 5 - 10 min women
  2. Plateau
    • Most variable period 30 seconds to hours
  3. Orgasm
    • Rhythmic contractions of muscles in pelvic region and throughout body
    • Ejaculation may or may not occur
  4. Resolution
    • Vasocongestion goes away
    • Refractory Period: time you cannot get another erection no matter how much stimulation (5 minutes to 24 hours) (related to frequency of sex)

G-spot/Prostate gland


Sexually Transmitted Diseases

  • Chlamydia - PID
  • HPV (Human Papilloma Virus): Genital Warts
    • Cervical cancer
  • Herpes
  • Yeast Infection
  • Bacterial Infection
  • Syphilis
  • Gonorrhea - PID
  • Crab Lice
  • Hepititis B, C
  • HIV

Safe Sex

  • Abstain
  • Masturbation
  • Mutual Masturbation
  • Condoms
  • Oral Sex
  • Monogamy

Oral Sex

  • Fellatio
  • Cunnilingus

Frequency of Sex

  • Highly variable
  • Married more sex with another person than single
  • First two years of a relationship


Sex Hormones


Testosterone from Testicles

Dihydroepiandosterone (DHEA) - Adrenal Glands

Estrogens- Ovaries and Fat Cells


  • Primary Sexual Characteristics: Develop around 12th week of  pregnancy


    • Penis, Clitoris
    • Scrotum, Labia
    • -,Vagina/Uterus
    • Testicles, Ovaries

    Cause of Development of Primary Sex Characteristics

    • Y - Chromosome
    • Testicles
    • Testosterone -> male primary sex  characteristics

    XX fetus exposed to DHEA at 12 weeks (adrenogenital syndrome):

    • Penis
    • No vagina
    • hermaphrodite
    • adrenogenital syndrome

    XY fetus NOT exposed to Testosterone

    • androgen insensitivity syndrome
    • testicles
    • vagina
    • clitoris
    • hermaphrodites

Most Gender differences  come from the environment

Brain differences

  • Testosterone  goes into developing brain cells, gets transformed to estrogen, then changes the development of the brain cells, prenatally.  Estrogen causes brain cells to become male.
  • Women have more connections in Corpus Callosum
  • Women's brains are less lateralized
  • Women's brains have more connections in the preoptic area of the hypothalamus
  • More cyclicity
  • DES is a synthetic estrogen that can cause girls to have more of a male brain.

Secondary Sex Characteristics: caused by Sex Hormones


Facial Hair

Body Hair

Pubic Hair

Arm pit Hair

Lower Voice

Enlargement of the Penis/Clitoris

Sperm Production

Muscle Development


Breast development

Fat distribution around hips and thighs


Sexual Dysfunctions

  • Sexual Desire Disorders
    • Hypoactive Sexual Desire Disorder|
    • Sexual Aversion Disorders
  • Sexual Arousal Disorders
    • Female Sexual Arousal Disorder
    • Male Erectile Disorder
  • Orgasm Disorders
    • Female Orgasm Disorders
    • Male Orgasmic Disorder
    • Premature Ejaculation
  • Sexual Pain Disorders
    • Dyspareunia
    • Vaginismus


Gender Identity Disorders






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Last modified: 10/06/05