Therefore, according to evolutionary theory, humans should be intermediate between gorillas and chimpanzees in respect both of promiscuity and polygamy.Īnother aspect of human anatomy in need of explanation is the size of the female breast. Relative to his body size, his penis and testicles are much larger than the gorilla's but not as large as those of the chimpanzee. The human male is slightly larger than the female. Under these circumstances natural selection would produce males with large penises and testicles. The male who inserts the most sperm in the female has the best chance of fertilising the egg in a situation where several males often copulate in quick succession with the same female. Male chimps therefore rely largely on their sperm rather than on physical strength and ferocity in order to compete with other chimps in the race to father offspring. Dominant males have more frequent, but not exclusive, access to females. Chimpanzee societies also have power pyramids, but they are more complex and "political" than with gorillas and orangutans. The male and female chimpanzee are of similar size. In his case a little penis and small testicles go a long way - surely the ultimate demonstration that size doesn't matter. The dominant ape, so the argument goes, doesn't need large genitalia producing lots of sperm in order to compete with the sperm coming from other apes. This evolutionary "arms race" escalated over time, producing massive males equipped with huge canines and prominent secondary sexual characteristics to attract mates.īut when you reach the top of the gorilla community-power ladder you have a relatively quiet life and pretty much uncontested access to all the females. The massive size of the male gorilla is interpreted to have resulted from competition among males for access to limited females, with natural selection favouring the evolutionary success of the largest, most powerful males. The male gorilla is much larger than the female, which is common across the animal kingdom in species that practice polygamy, i.e., where dominant males mate with multiple females. So how does evolutionary biology explain such marked differences in penis and testicle size? Let us look more closely at some arguments commonly used. The gorilla's flaccid penis is so demure that it is not readily visible. Testicle size, and the conspicuousness of the penis varies correspondingly. It measures 1.5 in an orangutan, three inches in a chimpanzee, and five inches in a man. To move on to some specific measurements, the average length of an erect penis in a gorilla is 1.25 in. But the truth is that, relative to his mass, the gorilla has a very small penis and small testicles compared to the male human.Īll of which prompts the question, posed in one publication in stark and vulgar form: "If the male gorilla is so big and tough, why are his balls so small?" Bain, it is the size of your gun that counts." Freeze's gun freeze's people.Although not a matter that I ever pondered, I would have assumed the male gorilla to be handsomely endowed in genitalia. Freeze (Arnold Schwarzenegger) in Batman & Robin (1998): "No matter what they tell you, Mr. (.) You know what they say about men with big feet." (2) Anna Scott (Julia Roberts) and William Thacker (Hugh Grant) in Notting Hill (1999): In our world, however, it's the three-inch fool ( The Taming of the Shrew) who clearly is the rule." We have the old adage, " Short and thick does the trick" (18 th C), as well as Robert Burns's "Nine inch will please a lady "while contemporary folk hyperbole immortalizes the man with a nine-inch pr**k and a twelve-inch tongue who can breathe through his ears. Yet the yard lives on in every man's fantasy, though the details of the fantasy clash. (1) Lawrence Paros, The Erotic Tongue (1984) about the word yard: "By 1850 it had become obsolete. Joke: "He wasn't big enough for an appetizer." d) All meat (large penis), no potatoes (small testes). c) Full lips (on him), fill lips (in her). Many myths surround the size a mans penis: Most men when questioned say they would prefer an erect penis eight to ten inches long. The average erect penis is 15cm, the normal range is considered to be between 13 and 18cm, comparatively the vagina is only 8 to 13 centimeters long, and only the outer 1/3 of it is supplied with nerves and is therefore sensitive to touch consequently even a very small penis can stimulate every square centimeter within the vagina and can certainly perform adequately. A man's penis starts to grow at puberty and reaches adult size by age seventeen.
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