MALE SEXUAL RESPONSE
- EXCITEMENT: ERECTION
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z4. In about 60% of men, the nipples become more erect.
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z5. Areas of the skin become reddened due to dilatation of the blood vessels. This sex flush occurs in about 50 to 60% of men.
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z6. The heart rate, blood pressure, and depth and rate of breathing begin to increase.
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z7. There is an increase in tension of voluntary and involuntary muscles (myotonia).
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