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Nottingham University Press. Most men experience a refractory period immediately following an orgasm, during which time they are unable to achieve another erection, and a longer period again before they are capable of achieving another ejaculation. Alfred Kinsey measured the distance of ejaculation, in "some hundreds" of men. Canine and Feline Endocrinology and Reproduction. The symptoms last for up to a week. Semen produced 12 to 14 months after the first ejaculation liquefies after a short period of time. The number of sperm in an ejaculation also varies widely, depending on many factors, including the time since the last ejaculation, [13] age, stress levels, [14] and testosterone.

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Catherine. Age: 24.
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This is known as the spinal generator for ejaculation.

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Wolves: Behavior, Ecology, and Conservation. Harvard Medical School Prostate Knowledge. It is not clear whether frequent ejaculation increases, [28] reduces [29] or has no effect [30] on the risk of prostate cancer. Ejaculation is usually very pleasurable for men; dysejaculation is an ejaculation that is painful or uncomfortable.

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