The Science of Ejaculation: How Serotonin, Nerves and the Pelvic Floor Control Climax
By Gregory S. Parries, MD, PhD. | Medically Reviewed by Christopher W. Boelter, MD | Last updated 2026-07-14 Ejaculation is not a switch located in the penis, prostate, spinal cord, or brain. It is a sequence. Sensory information must be detected, interpreted, and integrated. Autonomic nerves then move sperm and glandular fluids into the urethra. […]
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