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

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Willingham explains that this violent process has caused bedbugs to evolve “something very vagina-like where they tend to get stabbed.” This special less-armored area of their abdomen might minimize harm as the male injects his sperm into the female’s circulatory system. Gender-Bending Genitals 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. Dixson, Alan F. (26 January 2012). Primate Sexuality: Comparative Studies of the Prosimians, Monkeys, Apes, and Humans. Oxford University Press. ISBN 978-0-19-150342-9. Archived from the original on 31 December 2013 . Retrieved 6 September 2013. In giant anteaters, the (retracted) penis and testes are located internally between the rectum and urinary bladder. [136]

Evans, James Warren (15 February 1990). The Horse. W. H. Freeman. ISBN 978-0-7167-1811-6 . Retrieved 23 July 2013.

Dog sucking cock brutally and cumshot

Kelly, D. A. (2004). "Turtle and mammal penis designs are anatomically convergent". Proceedings. Biological Sciences. 271 (Suppl 5): S293–S295. doi: 10.1098/rsbl.2004.0161. PMC 1810052. PMID 15503998. Unlike other squirrel species, red squirrels have long, thin, and narrow penises, without a prominent baculum. [102] [103]

Friderun Ankel-Simons (27 July 2010). Primate Anatomy: An Introduction. Academic Press. ISBN 978-0-08-046911-9. Archived from the original on 26 March 2014 . Retrieved 23 July 2013. In males, the expulsion of urine from the body is done through the penis. The urethra drains the bladder through the prostate gland, where it is joined by the ejaculatory duct, and then onward to the penis. In 2010, entomologist Charles Linehard described Neotrogla, a new genus of barkflies. Species of this genus have sex-reversed genitalia. Females have penis-like organs called gynosomes that are inserted into vagina-like openings of males during mating. [142] In 2014, a detailed study of the insects reproductive habits led by Kazunori Yoshizawae confirmed that the organ functions similar to a penis – for example, it swells during sexual intercourse – and is used to extract sperm from the male. [143] [144] Mollusks Lilia, K.; Rosnina, Y.; Abd Wahid, H.; Zahari, Z. Z.; Abraham, M. (2010). "Gross Anatomy and Ultrasonographic Images of the Reproductive System of the Malayan Tapir (Tapirus indicus)" (PDF). Anatomia, Histologia, Embryologia. 39 (6): 569–575. doi: 10.1111/j.1439-0264.2010.01030.x. PMID 20809915. S2CID 46441225.Szykman, M.; Van Horn, R. C.; Engh, A.L. Boydston; Holekamp, K. E. (2007). "Courtship and mating in free-living spotted hyenas" (PDF). Behaviour. 144 (7): 815–846. CiteSeerX 10.1.1.630.5755. doi: 10.1163/156853907781476418. Archived (PDF) from the original on 2012-11-30. Male walruses possess the largest penis bones of any land mammal, both in absolute size and relative to body size. [83] [84] Sue Taylor Parker; Karin Enstam Jaffe (2008). Darwin's Legacy: Scenarios in Human Evolution. AltaMira Press. p.121. ISBN 978-0-7591-0316-0. Archived from the original on 26 March 2014 . Retrieved 23 July 2013. As with any other bodily attribute, the length and girth of the penis can be highly variable between mammals of different species. [16] [17] In many mammals, the size of a flaccid penis is smaller than its erect size.

Barry, R.E.; Shoshani, J. (2000). " Heterohyrax brucei". Mammalian Species. 645: 1–7. doi: 10.1644/1545-1410(2000)645<0001:hb>2.0.co;2. S2CID 28256848.Winkelmann's mouse can easily be distinguished from its close relatives by the shape of its penis, which has a partially corrugated glans. [104] Bart W. O'Gara; James D. Yoakum (2004). Pronghorn: ecology and management. University Press of Colorado. ISBN 978-0-87081-757-1. Archived from the original on 26 March 2014 . Retrieved 23 July 2013. a b Anderson, MJ (1998). "Comparative Morphology and Speciation in Galagos". Folia Primatol. 69 (7): 325–331. doi: 10.1159/000052721. S2CID 202649686.