Hmm... I am actually not sure what you're asking. Are you asking what a male orgasm is, like what happens, or how it works, technically speaking?
If the first, a male orgasm is when you ejaculate, climax, cum, or whatever you wanna call it.
If the second, it's pretty complex. It involves hormones, different parts of your physiology like the prostate, testicles, and so on, and when you orgasm, some muscles contract and then you ejaculate.
Does that answer your question, or were you asking something else? Feel free to come back and clarify if I misunderstood your question.
HTH
I assume that Skate_4_Ever79843 is a female, but not necessarily so.
In a male, the orgasm, brought on by sexual stimulation (ideally while his penis is in her vagina), is probably first noticed by him as contractions in the groin (the first 5-7 are the strongest and usually the ones that are felt) as the muscles there move sperm from his testicles (the epidydemis (sp?)) through the prostrate gland, the seminal vesicle adds semen and it is propelled through the urethra, out of the penis. Rapid breathing often happens briefly. Muscles that have been getting tense and tight, such as in the legs and buttocks, will "spasm" and can cause these body parts to move suddenly. Some kind of tingling sensation may be felt widely around his body. Then as brief as it is, it is done.
Just BEFORE the orgasm, the Cowper's gland secretes a clear sticky fluid to neutralize any traces of urine in the urethra, and it may come out the tip of his penis. The semen is a whitish-yellow sticky fluid that coagulates after ejaculation - or maybe it only does that inside the vagina to try to protect the sperm (although I've heard in narration of a TV show on Nova on PBS that some 20 percent of the sperm die within moments of arrival in the vagina). After a few minutes, the sperm are on their way trying to find their way through the cervix and uterus and into the fallopian tubes/oviducts to try to find the ovum... if there is one. Usually, of the tens of millions of sperm cells the male ejaculates, only a few hundred, at best, survive to find the ovum.