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jr4112000
When you're aroused, tubes called the vas deferens squeeze sperm from the testes toward the back of the urethra. The seminal vesicles also release fluid there.
kerriamolden
Sexual stimulation and friction provide the impulses that are delivered to the spinal cord and into the brain. Ejaculation is a reflex action controlled by the central nervous system. It is triggered when the sexual act reaches a critical level of excitement. It has two phases.

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