Male ejaculation
Ejaculation is the ejecting of semen from an erect penis, and is usually accompanied by orgasm. It is usually the result of sexual stimulation. (Rarely, it is due to prostatic disease).
A prerequisite to ejaculation is the sexual arousal of the male, leading to the erection of the penis, though not every arousal nor erection leads to ejaculation. There are wide variations in how long sexual arousal can last before ejaculation occurs.
When a man ejaculates before he wants to it is called premature ejaculation. If a man is unable to ejaculate in a timely manner after prolonged sexual stimulation, in spite of his desire to do so, it is called delayed ejaculation or anorgasmia. An orgasm that is not accompanied by ejaculation is known as a dry orgasm.
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