Human sexuality..

[F.W 5,734]

Among the Primates,especially the Apes,our own order,Humans have the biggest penis in relation to size.If ours were like a Gorilla,it would be no more than like your little finger,or a Chimp,maybe like your middle finger.There must have been a reason in our ancestry why this happened.Maybe as we became more upright,less powerfully built,but much more cerebral,and social,instead of using displays of power,or violence as in Gorillas and Chimps,maybe our penis size was an indicator of fitness.Perhaps there were displays by groups of males in which they would all try get erections and then the females would try attract the males with the biggest,a male couldnt fake his penis size in such a situation,it would be a test of "macho" if nothing else...in our current ways,we still find things,in pornography,like group sex,or bukkake(lots of men using 1 or 2 girls as cum rags) arousing.We generally like to see the guys with the biggest dicks getting it away.Maybe this is deep in our genetics.Because over the millennia,Human sexuality and morality changed radically from our ape like ancestors.In most Primates,only the biggest males get the females,the rest go to the wall.Also,as we developed the upright stance,the female body changed,moving the vagina much more forward,enabling face to face mating,which no other primate does.Another factor perhaps in the development of female sexuality,the need for comfort and affection from the male,instead of just basically doggy style faceless matings,leading to more settled male behaviours,and societies.

But as we evolved,no longer did a male need to be more macho,females began to judge males on their looks,character,personality as opposed to their ability to brain the life out of their rivals,and mating became much more egalitarian.There is an Ape,the Bonobo,a kind of pygmy Chimp,from the jungle of W.Africa,which does have a very free sex society.In most groups,most members will have had sex with most of the other members,freely,even incest is quite common.Its thought they use sex as a group bonding exercise.Their penises are quite large in relation to body size too.Perhaps our ancestors also followed this scheme,leading to more peaceful and productive societies.We obviously have inherited our sexuality from our ancestors,maybe they too developed various fetishes.The true opposable thumb of OUR species,enabled us to grip our penis properly,enabling masturbation.Figures of naked females have been found in cave sites etc,its thought these were maybe used as a kind of portable pornography,to take with you on the hunts,many cave paintings have mysterious "V" or "W" shaped images,which some think may be representations of female genitalia,maybe the first pornography?This has always fascinated me,ive read a little about our primitive ancestry,i like to think we are just cleaner,and more comfortable versions of our long distant ancestors.If THEY hadnt ever got horny,WE wouldnt be here!

Thank you for reading...please disagree with any points of your own..

[Brutus 2,206]

Great topic, cant' believe no one chimed in thus far. I too am fascinated by this stuff, and have studied the dynamics between men and women very deeply. But here is my take. I say that human males evolved to have big penises in relation to other apes due to female preference. In most species, the female's desires drive evolution because they carry and give life. Eggs are in much lower numbers in comparison to sperm, which means sperm is worth less. Simple supply and demand. This translates to the social interactions between the sexes, being that males favor the female preference at the expense of their own. Examples are chivalry, not making women go to war, public shaming for harming a woman and a general unwillingness to punish them as harshly as we do men in society. 

The point of this is that men are the way they are because women want us so. Among their desires include tall stature, deep voice, intelligence, wealth and large penis. A small penis is seen as less manly. Even back in our ancient times, seeing a man with a smaller penis probably made women feel that such a man was still not mature, still a boy, therefore unworthy of sex. The bigger guys were seen as more manly. Given that women have clitorises allowing them to feel pleasure, that orgasm makes pregnancy more likely and that large penises are more likely to induce orgasm, therein lies their preference and men's response to appease their preference through evolution. 

So one might respond by saying that most guys have smallish penises and few have really big ones and so that proves that small penises are not a relevant deterrent for women. That small guys wouldn't have survived to this point. To that I say it makes perfect sense that at least half to a large majority of men are smaller than women prefer, in order to continue driving men to evolve in the right direction and not stagnate. A hierarchy with alphas can only exist if their are betas to act as an example of what to improve from. So 20% of men are the ideal of women's desires, the rest are betas that have work to do, some of which is beyond their control, which is why record numbers of people are single today. A few centuries from now, maybe the average penis size will be 7 inches instead of the 5 inch average of current day, but the preference for the largest among those men will remain and maybe women might consider 7 to be small and 10 or 11 will be desirable, perhaps because their average vaginal size will have increased.

My only slight disagreement would be your point about women judging primarily by looks, and personality. While those do factor in, the primary criterion is wealth. This is why sometimes short, fat, ugly guys and old guys can snag young beautiful women. The common factor is that such guys with these women are very wealthy, otherwise those hot women would want to just be friends or not interact with them at all. There are exceptions and some women are with men that they out earn but they certainly don't prefer it. There is plenty of research confirming this.

Edited September 3, 2017 by Brutus