Masters and Johnson, a marred couple, developed a 4-phase sexual response cycle. Based on a common physiological or physical sequence men and women experiece when having sexual relations.
Two Definitions:
* Vasocongestion- refers to the filling or enlargement of the genital area.
*Myotonia- refers to muscle tension
4-Phase Sexual Response Cycle:
1) Excitement
Men- penis erects, testes enlarge and elevate
Women- Lubrication, erection of clitoris, breasts increase in size and elevate.
Both- mytonia, increased heart rate and increased blood pressure.
2) Plateau
Men- Testes further elevated into position for ejaculation, Cowper`s Gland secrets a few drops of viable semen.
Women- Outer one-third contracts, inner two-thirds expands, uterus increases in size and elevates, clitoris withdraws or disappears.
3)Orgasmic
Men- Contractions to gather semen in place for ejaculation, relaxation of the Sphincter muscle to allow release o fluid.
Women- 3-15 contractions in the plevic muscles around the vaginal barrel and uterus leading to a release.
Both- Body spasms, increas in heart rate and breathing rate.
4) Reolution
Men- Blood withdraws from genitals, penis relaxes.
Women- Release of blood in genitals and breasts.
Both- Muscular tension releases.
**After experiencing the 4 phases, Men need a resolution. Women are capable of multiple cycles without a resolution**
**If orgasm doesn`t occur then it takes longer to return to phase 1 which could cause `Blue Balls`**
**Resolution time depends on the age of the person**
http://www.youtube.com/watch?v=aZcYTCo-D9s
Here is a video clip about Masters and Johnson, developing research about men and women, orgasms and the phases of sex.
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