Ejaculation is the release of semen (also known as cum) from the male reproductive system as a result of sexual stimulation. It is a complex process that involves several different parts of the male reproductive system, including the vas deferens, seminal vesicles, prostate, and urethra. Ejaculation has two phases: emission and expulsion. During the emission phase, sperm are moved from the testes and the epididymis to the beginning of the urethra. During the expulsion phase, the semen is moved through the urethra and expelled from the body. Ejaculation is controlled by the nervous system, which sends signals to the muscles surrounding the urethra to contract and propel semen out of the penis.

Ejaculation usually occurs during sexual climax or orgasm, but it can also happen without an orgasm. It typically starts when a person begins producing sperm around the age of puberty, which generally happens between 10 and 12 years old. A person usually ejaculates for the first time during a “wet dream” or after masturbating.

There are several disorders associated with ejaculation, including premature ejaculation, delayed ejaculation, and retrograde ejaculation. If you think you have a problem with ejaculation, it is important to talk to your healthcare provider. There are treatment options available to help you.