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At the beginning of the video, his penis is flaccid (non-aroused, soft, and fully flexible). During arousal it becomes engorged with blood and the erectile tissues expand and harden, causing first a partial erection (1:20) in which the penis is larger and slightly firmer but still flexible, and then a full erection (2:30) in which the penis ...
Video_of_Penile_erection.ogv (Ogg multiplexed audio/video file, Theora/Vorbis, length 24 s, 320 × 240 pixels, 989 kbps overall, file size: 2.8 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
The video begins with the subject's genitals in a non-aroused flaccid state (0:00). As arousal progresses(0:30), the subject's penis becomes erect , the scrotum tightens and the testicles elevate. At the peak of arousal (0:57), orgasm occurs and semen is ejaculated from the penis in a series of rhythmic contractions.
During the course of the video, the subject's semi-erect penis produces a drop of pre-ejaculate (also known as preseminal fluid, Cowper's fluid, or "pre-cum"); this is the typical amount produced at one time by this subject during arousal. A more thorough demonstration of the viscosity of this fluid can be seen here.
Child Protection and Obscenity Enforcement Act warning This work, which was made after November 1, 1990 and depicts one or more actual human beings engaged in sexually explicit conduct—including but not limited to "lascivious exhibition of the genitals or pubic area of any person" (USC 18 § 2256)—has record-keeping requirements in the United States under the Child Protection and Obscenity ...
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
An erection (clinically: penile erection or penile tumescence) is a physiological phenomenon in which the penis becomes firm, engorged, and enlarged. Penile erection is the result of a complex interaction of psychological, neural, vascular, and endocrine factors, and is often associated with sexual arousal, sexual attraction or libido, although erections can also be spontaneous.