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  2. File:Penis ejaculates inside a vagina.webm - Wikipedia

    en.wikipedia.org/wiki/File:Penis_ejaculates...

    Original file (WebM audio/video file, VP8/Vorbis, length 46 s, 1,920 × 1,080 pixels, 2.23 Mbps overall, file size: 12.16 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.

  3. File:Sexual intercourse in the woman on top position.webm

    en.wikipedia.org/wiki/File:Sexual_intercourse_in...

    Original file (WebM audio/video file, VP8/Vorbis, length 1 min 33 s, 605 × 1,080 pixels, 2.16 Mbps overall, file size: 23.83 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.

  4. File:Standing sexual intercourse.webm - Wikipedia

    en.wikipedia.org/wiki/File:Standing_sexual...

    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.

  5. Inbreeding - Wikipedia

    en.wikipedia.org/wiki/Inbreeding

    Inbreeding is also used to reveal deleterious recessive alleles, which can then be eliminated through assortative breeding or through culling. In plant breeding, inbred lines are used as stocks for the creation of hybrid lines to make use of the effects of heterosis. Inbreeding in plants also occurs naturally in the form of self-pollination.

  6. File:Male Masturbation with Ejaculation Video.webm - Wikipedia

    en.wikipedia.org/wiki/File:Male_Masturbation...

    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: 7.6 MB) This is a file from the Wikimedia Commons .

  7. File:Video of Penile erection.ogv - Wikipedia

    en.wikipedia.org/wiki/File:Video_of_Penile...

    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.

  8. File:Complete Penile Erection Process.ogv - Wikipedia

    en.wikipedia.org/wiki/File:Complete_Penile...

    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 ...

  9. Human mating strategies - Wikipedia

    en.wikipedia.org/wiki/Human_mating_strategies

    In evolutionary psychology and behavioral ecology, human mating strategies are a set of behaviors used by individuals to select, attract, and retain mates.Mating strategies overlap with reproductive strategies, which encompass a broader set of behaviors involving the timing of reproduction and the trade-off between quantity and quality of offspring.