Question

How does the release of sperms during copulation occur in human males?

Answer 1

   It occurs due to muscle movements in the male reproductive system.

   Sperm or spermatozoa are produced in the testes and stored there. This process is called spermatogenesis. They are released from testes during ejaculation. The hormone Testosterone (androgen) is responsible for production of sperm.

   The corpus spongiosum is the tube like structure that contains the urethra.  Urethra tube is the passage for both urine and semen. The sperm moves from testes into the ductus deferens. Then into pelvic cavity. Then they move into the prostate over the ureter. Then sperms move into urethra through the vas deferens and forced out of urethra by ejaculation.

  That sperm ejaculation action is stimulated by sympathetic nerves. The peristalsis muscle movements help sperm move forward. The contraction in muscles forces sperm to propel forward with force and speed.

Answer 2

Ejaculation is the discharge of semen (normally containing sperm) from the male reproductory tract, usually accompanied by orgasm. It is the final stage and natural objective of male sexual stimulation, and an essential component of natural conception. In rare cases, ejaculation occurs because of prostatic disease. Ejaculation may also occur spontaneously during sleep (a nocturnal emission or "wet dream"). Anejaculation is the condition of being unable to ejaculate. Dysejaculation is an ejaculation that is painful or uncomfortable