Vasectomy is a surgical procedure that prevents the sperm from leaving the body. In this procedure, the vas deferens is cut and sealed. This doesn't cause any change in the semen produced in the body, ejaculation or orgasms.
Sources:
https://www.webmd.com/sex/birth-control/vasectomy-overview
https://www.plannedparenthood.org/learn/birth-control/vasectomy
https://www.mayoclinic.org/tests-procedures/vasectomy/about/pac-20384580
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