The penis of a man longer and thicker than other anthropoid primates. Even the largest of gorillas, which weigh twice as much as the person, the length of the penis in erection only past six inches.
But the eggs we have are quite small. In chimpanzees it is more than a third of the brain, and we have less than three percent. The size of a human penis and testicles due to our strategy pairing and it allows you to better understand the origins of early human culture.
Primates have very diverse mating behavior. It can be monogamous, polygyny (this is when the male has multiple females), as well as mixed, when a group of several males and females. One of the indicators of mating behavior is the difference in size of males and females. This is more pronounced than sexual dimorphism, the higher the probability polygenic and mixed group relations between males and females. This can be seen by observing our closest relatives, like chimpanzees and gorillas.
Male chimps are much larger than females, and the mating system they have combined. In fact, male chimps all the time having sex with any of the females and under any pretext. Therefore, females can have sperm from different partners. Therefore, direct competition between sperm, rather than between producing their animals. For this reason, chimpanzees in the evolution process appeared in large testicles that produce large quantities of sperm, and a few times a day.
Males gorillas are also much larger than females, but they polegina or harem mating system where several females live with one male. Since inside the womb of the gorilla there is no competition, males have no need to compete in the testicles to produce more and more sperm. Therefore, the testicles are quite small. The same applies to modern man whose testicles are also quite modest size and produce small amounts of sperm. In fact, the number of sperm in humans is reduced by 80% if he ejaculates semen more than twice a day.
Compared to our closest relatives such as chimpanzees, gorillas and orangutans, penis man big. However, the expert on primates Alan Dixon (Alan Dixson) in his beautifully written book “the Sexuality of apes” (Primate Sexuality) puts forward the idea that if you look at all primates, including the lower monkeys, is nothing more than wishful thinking.
Comparative measurements indicate that the penis in humans is exceptionally long. For example, the native Eastern Africa Hamadryad length of the penis in erection 13 inches, i.e., slightly shorter than the average male, although the weight he has three times less.
Besides, the human penis is very uncomplicated. He has no lumps, protrusions, bulges, and other interesting features, which can boast of other primates. Simple penises in primates usually where their species are monogamous.
The mystery of monogamy
This observation contradicts the fact that males much larger than females. This fact indicates that in the process of evolution in humans were poligonnye than monogamous marriage. This is confirmed by anthropological data, showing that modern humanity is in the majority shall poligonnye relationship. Anthropologists, McClellan Ford (Clellan Ford) and Frank beach (Frank Beach) in his book “Patterns of sexual behavior” (Patterns of Sexual Behaviour) indicate that in 84% of the 185 human cultures for which they have data that exists or existed polygamy.
But even in these societies, most people remain monogamous. Polygamy is usually the privilege of the rich men with high social status. It should be noted that the hunter-gatherers around the world have supported only the permanent or long-term monogamous relationship. This suggests that our ancestors existed such a system of mating.
But at first glance it may seem that men are wiser to engage in sex for the production of offspring with the greatest possible number of women. Human monogamy have long baffled anthropologists, and they put a lot of effort in order to understand what causes make a man stay with one woman.
There are three main theories. First, children for a long time, need parents care, and training as they grow up we slowly. Second, the male must guard his mate from other males. Thirdly, our children are a long time helpless, and the other males can kill them. So that the children reached maturity, the male must stay with them and protect them, both physically and socially. Perhaps that is why males are bigger than females.
If you look at the evolution of monogamous mating system in humans through the prism of human society, it becomes clear that to protect several females require tremendous social effort. A man can protect his many women only when it receives additional resources and power. He usually does so to protect them other men. So monogamy can be called a means of adaptation to protect the females and children from other males. If a few partners to do it becomes much more difficult. So monogamy has a social base and reinforced by cultural norms.
Therefore, in a complex human society the largest and most important sexual organ is the brain. Somewhere in the evolutionary past, our mind and our social behavior become the primary means of access to sex partners. But the size and peculiar form of the penis.
