As with any other bodily attribute, the length and girth of the penis can be highly variable between mammals of different species. Copulation time ranges from 7 to 35 minutes, averaging 11—15 minutes. Wikimedia Commons has media related to Bull penis. The tule elk: its history, behavior, and ecology. It has been postulated that the shape of the human penis may have been selected by sperm competition. Post copulation genital grooming has also been observed. Ejaculation is the ejecting of semen from the penis and is usually accompanied by orgasm. Archived from the original on 7 July Species of this genus have sex-reversed genitalia.
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