Sexual Response Cycle (Phases of Sexual Response) (cont.)
Phase 2: Plateau
General characteristics of the plateau phase, which extends to the brink of
orgasm, include the following:
- The changes begun in phase 1 are intensified.
- The vagina continues to swell from increased blood flow, and the vaginal
walls turn a dark purple.
- The woman's clitoris becomes highly sensitive (may even be painful to
touch) and retracts under the clitoral hood to avoid direct stimulation from the
- The man's testicles are withdrawn up into the scrotum.
- Breathing, heart rate, and
blood pressure continue to increase.
- Muscle spasms may begin in the feet, face, and hands.
- Muscle tension increases.
Phase 3: Orgasm
The orgasm is the climax of the sexual response cycle. It is the shortest of
the phases and generally lasts only a few seconds. General characteristics of
this phase include the following:
- Involuntary muscle contractions begin.
- Blood pressure, heart rate, and breathing are at their
highest rates, with a rapid intake of oxygen.
- Muscles in the feet spasm.
- There is a sudden, forceful release of sexual tension.
- In women, the muscles of the vagina contract. The
uterus also undergoes
- In men, rhythmic contractions of the muscles at the base of the penis
result in the ejaculation of
- A rash, or "sex flush" may appear over the entire body.
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