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Maisels, Charles Keith (1999). Early Civilizations of the Old World. London: Routledge. ISBN 978-0-415-10975-8.
There's not a binary that is categorically one thing or the other when it comes to genitalia,” says Willingham.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 SS:The remaining drakes are in pairs of 2 and kept in 23 separate pens to prevent incessant, aggressive, injury- causing behavior. We still struggle with aggression between pairs and at times between pair mates. I randomly see one trying to mate his pen mate and I worry what the effects of this are if there is penetration? Sued-Badillo, Jalil (2003). Autochthonous Societies. General History of the Caribbean. Paris: UNESCO. ISBN 978-92-3-103832-7.
Children will adore this hilarious rhyming story by the much-loved author, Kaye Umansky, one of the funniest children's writers around. Livezey, Bradley C. (October 1986). "A phylogenetic analysis of recent Anseriform genera using morphological characters" (PDF). The Auk. 103 (4): 737–754. doi: 10.1093/auk/103.4.737. Archived (PDF) from the original on 2022-10-09. Sometimes one just isn’t enough. Or so it seems for the echidna, a spiny egg-laying mammal, which has evolved a four-headed penis. During copulation, echidna penises operate on a part-time schedule: half the penis temporarily shuts down while the other two heads are responsible for fertilization. But those extra two heads aren’t there just to show off. Next time the echidna mates, he’ll alternate which half he uses.Their two-headed penises resemble tiny swords, and battles can last for up to an hour as they take turns attempting to stab the other. The winner pierces the flesh of the other flatworm to deposit their sperm, something scientists refer to as “traumatic insemination.” Livingston, A. D. (1998-01-01). Guide to Edible Plants and Animals. Wordsworth Editions, Limited. ISBN 9781853263774. Dolphins are known for their intelligence, promiscuity and absurdly dexterous penises. They have a prehensile penis, meaning it can swivel, grab and grope, much like a human hand. A prehensile penis helps males navigate the complex, labyrinth-like reproductive tracts of female dolphins. 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
Garling, Caleb (June 24, 2013). "Huge traffic spike hits 'private' search engines after NSA leaks". San Francisco Chronicle. Archived from the original on October 29, 2013 . Retrieved July 10, 2013. Sometimes, penises pose logistical challenges. That is certainly the case for the leopard slug, which is so well-endowed that it has to go to extreme measures to reproduce. This can be modified for seasons of the year, characteristics of plants and trees, parts of the body, colors, elements of writing, for math, etc.Jeffries, Richard (2008). Holocene Hunter-Gatherers of the Lower Ohio River Valley. Tuscaloosa: University of Alabama Press. ISBN 978-0-8173-1658-7. Thorkelson, Berit (2005). You Know You're in Minnesota When...: 101 Quintessential Places, People, Events, Customs, Lingo, and Eats of the North Star State. (1st ed.). Guilford, Connecticut: Insiders' Guide. p. 18. ISBN 978-0-7627-3895-3. Mating can be competitive, with a single flatworm fertilizing another. In other cases, like with the tiger flatworm, they can play both roles: each flatworm gives and receives sperm from its partner. Whale Hello There! Hirsch, Adam (October 7, 2008). "Voting Round for the BOSS Mashable Challenge". Mashable . Retrieved March 19, 2013.
Penises have been a longstanding subject of scientific fascination, and they’re far more studied than vaginas. One explanation for this research gap, says Willingham, is “because of who has been asking the questions until quite recently, and who's been deciding how those questions should be answered.” The theory is based on our history of observation, experimental past set ups, and current arrangement.
I’m thinking of replacing all the pen dividers with metal panels so they can’t see or get to one another and when a pair is in the common no one can see them [edit: we did indeed accomplish this using metal roofing panels as pen dividers, and the stress levels in the barn went down DRAMATICALLY and the drakes relaxed, stopped fighting, and started expressing a healthy range of personality traits].
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