Creatures with Cocks: Hilarious Adults-Only Cartoons for Lovers of the Natural World and Dick Jokes

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Most marsupials, except for the two largest species of kangaroos and marsupial moles [120] (assuming the latter are true marsupials), have a bifurcated penis, separated into two columns, so that the penis has two ends corresponding to the females' two vaginas. [121] Monotremes Small, Meredith F. (1993). Female Choices: Sexual Behavior of Female Primates. Cornell University Press. ISBN 978-0-8014-8305-9 . Retrieved 23 July 2013.

Hayssen, Virginia Douglass; Tienhoven, Ari Van (1993). Asdell's Patterns of Mammalian Reproduction: A Compendium of Species-Specific Data. Cornell University Press. ISBN 978-0-8014-1753-5 . Retrieved 23 July 2013.Hoffmeister, Donald F. (2002). Mammals of Illinois. University of Illinois Press. ISBN 978-0-252-07083-9 . Retrieved 22 July 2013.

John A. Byers (1997). American Pronghorn: Social Adaptations and the Ghosts of Predators Past. University of Chicago Press. ISBN 978-0-226-08699-6. Archived from the original on 1 January 2014 . Retrieved 15 July 2013. The record for the largest penis size to body size ratio is held by the barnacle. The barnacle's penis can grow to up to forty times its own body length. This enables them to reach the nearest female for fertilization.König, Horst Erich; Liebich, Hans-Georg (2007). Veterinary Anatomy of Domestic Mammals: Textbook and Atlas. Schattauer Verlag. ISBN 978-3-7945-2485-3 . Retrieved 23 July 2013. Unlike other species that use a similar process—butterflies, mites, beetles—males of these species don’t have a similar penetrative organ, only the females do, says Willingham. A Temporary Tool

Hooper, E.T.; Musser, G.G. (1964). "The glans penis in Neotropical cricetines (Family Muridae) with comments on classification of muroid rodents". Miscellaneous Publications of the University of Michigan Museum of Zoology. 123: 1–57. hdl: 2027.42/56367. Winkelmann's mouse can easily be distinguished from its close relatives by the shape of its penis, which has a partially corrugated glans. [104] Feldhamer, George A.; Thompson, Bruce C.; Chapman, Joseph A. (2003). Wild mammals of North America: biology, management, and conservation (2nded.). Baltimore, Md.: Johns Hopkins University Press. p.432. ISBN 9780801874161. Archived from the original on 2013-11-04 . Retrieved 2013-11-08. The most common form of genital alteration is circumcision, the removal of part or all of the foreskin for various cultural, religious, and more rarely medical reasons. There is controversy surrounding circumcision. a b Brennan, P. L. R. et al. Coevolution of male and female genital morphology in waterfowl. PLoS ONE 2, e418 (2007).

Percequillo, A.R.; Weksler, M.; Costa, L.P. (2011). "A new genus and species of rodent from the Brazilian Atlantic Forest (Rodentia: Cricetidae: Sigmodontinae: Oryzomyini), with comments on oryzomyine biogeography". Zoological Journal of the Linnean Society. 161 (2): 357–390. doi: 10.1111/j.1096-3642.2010.00643.x. Like many organisms with intriguing phalluses, flatworms that engage in penis fights are hermaphrodites—just one example that showcases how a sex binary system fails to account for the range, fluidity and diversity of many organisms. Some species of flatworm engage in this duel to see who can inseminate the other. The good-natured swimmers have retractable penises that are kind of like multi-tools. Not only does the male dolphin's penis swivel around, but it's often also used to feel out other objects, kind of like a human hand. This gives the dolphin a "ravenous sexual appetite," says Neatorama, and could help explain why males are often seen trying to "hump inanimate objects" and "other animals like sea turtles." Stonehouse, Bernard; Gilmore, Desmond (1977). The Biology of marsupials. University Park Press. ISBN 978-0-8391-0852-8 . Retrieved 25 July 2013.

Michael L. Augee; Brett A. Gooden; Anne Musser (January 2006). Echidna: Extraordinary Egg-laying Mammal. Csiro Publishing. ISBN 978-0-643-09204-4. Archived from the original on 26 March 2014 . Retrieved 23 July 2013. a b William O. Reece (2009-03-04). Functional Anatomy and Physiology of Domestic Animals. John Wiley & Sons. ISBN 9780813814513. Archived from the original on 2018-03-20. The term penis applies to many intromittent organs, but not to all. As an example, the intromittent organ of most Cephalopoda is the hectocotylus, a specialized arm, and male spiders use their pedipalps. Even within the Vertebrata there are morphological variants with specific terminology, such as hemipenes. Dolphins don’t just use their penises for baby-making, either. Bottlenose dolphins frequently copulate for pleasure, and often with members of the same sex. Dolphin sex doesn’t last long, only about ten seconds, but males can ejaculate multiple times an hour. Fencing With a Phallus These blurred lines often give rise to nature's most fascinating sexual organs. Here are eight penises that are as cool and surprising as the creatures that wield them: Heads Above the Rest

Dog sucking cock brutally and cumshot

William F. Perrin; Bernd Wursig; J. G.M. Thewissen (26 February 2009). Encyclopedia of Marine Mammals. Academic Press. ISBN 978-0-08-091993-5. Archived from the original on 11 October 2013 . Retrieved 28 June 2013. The human penis is made up of three columns of tissue: two corpora cavernosa lie next to each other on the dorsal side and one corpus spongiosum lies between them on the ventral side. The urethra, which is the last part of the urinary tract, traverses the corpus spongiosum, and its opening, known as the meatus / m iː ˈ eɪ t ə s/, lies on the tip of the glans penis. It is a passage both for urine and for the ejaculation of semen. Malie Marie Sophie Smuts; Abraham Johannes Bezuidenhout (1987). Anatomy of the dromedary. Clarendon Press. ISBN 978-0-19-857188-9. Archived from the original on 26 March 2014 . Retrieved 11 June 2013. Veale, D.; Miles, S.; Bramley, S.; Muir, G.; Hodsoll, J. (2015). "Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15 521 men". BJU International. 115 (6): 978–986. doi: 10.1111/bju.13010. PMID 25487360. S2CID 36836535. This section may be in need of reorganization to comply with Wikipedia's layout guidelines. Please help by editing the article to make improvements to the overall structure. ( June 2013) ( Learn how and when to remove this template message)