Each contraction is documented in the video, with the time between muscle contractions shown. Once arousal has peaked (1:35), the penis returns to its flaccid state, the scrotum loosens, and the testicles descend. Male_masturbation_with_ejaculation_video.webm (webm audio/video file, vp8/vorbis, length 1 min 15 s, 720 × 480 pixels, 851 kbps overall, file size
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Commons is a freely licensed media file repository Male erection and ejaculation anatomy & physiology Erection, flaccid, vascular event, penile arteries and veins, vasoconstriction, vasodilation, smooth muscle, parasympathetic impulses. After the semen enters the penis, muscles like the bulbospongiosus and ischiocavernosus in the pelvic floor contract, forcefully expelling the semen from the urethra through a process called ejaculation.
In this video a male (age 35) ejaculates twice (30 minutes between) In the first ejaculation the amount of semen is much bigger and the ejaculation was easier to achieve In the second ejaculation the semen releases more slowly and the amount of semen is smaller. This is mechanism of erection and ejaculation by healthy male on vimeo, the home for high quality videos and the people who love them.
At the peak of arousal (0:57), orgasm occurs and semen is ejaculated from the penis in a series of rhythmic contractions
(in this demonstration, there are 15 strong contractions followed by 10 weaker contractions)
