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Human reproduction naturally takes place as internal fertilization by sexual intercourse. During this process, the man inserts his erect penis into the woman's vagina and then either partner initiates rhythmic pelvic thrusts until the man achieves orgasm , which leads to ejaculation of semen containing sperm into the vaginal canal.
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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.
English: This video is an example of a man and woman having penile-vaginal intercourse in the standing position, a relatively normal example of sexual intercourse. It begins with the insertion of a man's erect penis into a woman's vagina at 0:07, followed by pelvic thrusts, becoming faster, initially to stimulate the vagina as it continues to lengthen and become lubricated.
The desire for sensual pleasure is usually the main motivation for humans, and sometimes the wish to have a baby or more children. [2] [3] The biological function of vaginal intercourse is human reproduction. During coitus without a condom, sperm enter the vagina, first with the pre-ejaculate and then a larger amount through male ejaculation. [4]
Original file (WebM audio/video file, VP9/Opus, length 1 min 13 s, 854 × 480 pixels, 1.65 Mbps overall, file size: 14.4 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
The human reproductive system includes the male reproductive system, which functions to produce and deposit sperm, and the female reproductive system, which functions to produce egg cells and to protect and nourish the fetus until birth. Humans have a high level of sexual differentiation.
Human sexuality portal; Articles relating to sexual intercourse (coitus, copulation), the insertion and thrusting of the male penis inside the female vagina for sexual pleasure, reproduction, or both. Sexual penetration has been known by humans since the dawn of time, and has been an instinctive form of sexual behaviour and psychology among