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A penis (plural penises or penes /-niːz/) is the main sexual organ that male animals use to inseminate females (or hermaphrodites) during copulation. It is also used to urinate.
Such organs are found in many animals, both vertebrate and invertebrate, but males do not always have a penis in every species, and in those species in which the male does have a so-called penis, the penises in those species are not homologous.
References[change | change source]
- ↑ Janet Leonard; Alex Cordoba-Aguilar R (18 June 2010). The Evolution of Primary Sexual Characters in Animals. Oxford University Press. ISBN 978-0-19-971703-3. Retrieved 20 July 2013.