And maybe you should check out your pet at home, since "red rocket" dog and "genitally-barbed" cat penises are some of the most unusual peckers out there. These tubes are in the shape of a cylinder that, as a female tortoise seduces him, will result in a puffed up package that is twice its original size. If that's too normal, then perhaps a tortoise penis will be amusing enough. As if sex on "Animal Planet" wasn't crazy enough, these animal penises are the craziest and most cartoonish packages that a female counterpart could ever ask (or not ask) for.ĭolphin penis might sound like the name of a dinner in a foreign country, but they are in fact insanely retractable monsters that grope fellow dolphins (and the occasional sea diver) left and right. You will not believe the shapes and sizes you will read about and the uses you will learn about. Peruse the penises of animals from all walks of life to see how unique their units are. ![]() This may have been the final nail in the coffin for the already diminished baculum, which was then lost in ancestral humans.The strangest penises on earth are located within the confines of this marvelous list. ![]() The researchers suggest that this may be why these species have retained a baculum - albeit a small one.Ĭo-author, Dr Kit Opie (UCL Anthropology), commented: "After the human lineage split from chimpanzees and bonobos and our mating system shifted towards monogamy, probably after 2mya, the evolutionary pressures retaining the baculum likely disappeared. However, they are characterised by polygamous mating systems, so they experience high levels of postcopulatory competition between males. Given the results of our study, this may help to unravel the mystery of why the baculum was lost in the human lineage."Ĭhimpanzees and bonobos, humans' closest relatives, have very small bacula (between about 6-8mm) and short intromission durations (around 7 seconds for chimpanzees and 15 seconds for bonobos). In these circumstances, only one male has access to a female and postcopulatory competition between males is absent or very low level.īrindle added: "Interestingly, humans have neither prolonged intromission durations, nor high levels of postcopulatory sexual competition. Baboon pulls penis out 74,685 views At the safari of Mallorca (spain) a baboon got in front us in our car and pulled his penis out, that is apparently very long. Instead humans tend to be monogamous or, more rarely, polygynous (where one male mates with multiple females). However, human mating systems are not like this. ![]() In species where mating occurs between multiple males and multiple females (known as polygamy), there is acute competition between males to fertilise a female. When any cultural aspects of sex are removed and a male's aim is solely to ejaculate, humans have a short intromission duration. The findings of the study may also provide clues as to why humans do not have a baculum. Prolonging intromission helps a male to guard a female from mating with any competitors, increasing his chances of passing on his genetic material." High levels of postcopulatory sexual competition between males also predicted longer bacula in primates.įirst author, Matilda Brindle (UCL Anthropology), said: "Our findings suggest that the baculum plays an important role in supporting male reproductive strategies in species where males face high levels of postcopulatory sexual competition. Prolonged intromission was also found to predict a longer baculum in primates and carnivores. The study found that prolonged intromission - defined as penetration for longer than 3 minutes - was correlated with baculum presence across the course of primate evolution. The work uncovers that the baculum first evolved in mammals between 145 and 95 million years ago. ![]() The research, published today in the Royal Society journal Proceedings of the Royal Society B, shows that the ancestral mammal, like humans, did not have a baculum - but both ancestral primates and carnivores did. The baculum has been described as "the most diverse of all bones", varying dramatically in length, width and shape in the male mammals where it is present.
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