So I was reading this article, about a guy who felt ashamed because he caught his wife cheating, and after kicking the guy in the testicles, he realized that he himself had a raging hard on.
And some guy. (supposedly a counselor) said it was because deep down in our instincts, guys suffer from sperm competition. When they see a girl being impregnated, they try to eliminate the other mans sperm and replace it with her own. That is why he had an erection, and that is also the reason a penis is shaped the way it is. (The bigger head and narrower shaft serves as a sort of tool to scoop the other sperm out)
Sounds strange, but does make some sense. So I ask, is there any truth to this statement? Or is there another reason why the penis is shaped the way it is?
ok so I'm an ecology student not a Dr (one final exam left!!) but here's what I know about penis shape in the animal kingdom from an evolutionary viewpoint. Sperm competition is real but it doesn't necessarily relate to penis shape, for example the sperm of the woodmouse, once inside the female, can connect into long chains to reach its destination quicker than a lone sperm, but this doesn't effect the shape of the penis. As for the head being used to scoop out a competitors sperm; a dragonfly penis has barbs that scrape out other sperm from inside the females reproductive tract and most of the males mating effort will be to do this before he himself ejeculates. In some insects the barbs on the penis serve to 'shred' the females reproductive tract so that she isn't able to mate again and this ensures paternity for the male. I can see the logic these things can relate to humans phisiologically (with the exception of damage to the female) but the behavioural aspect is something, I think, has been selected out (apart from any innate/'hardwired' behaviour) as there is little direct male competition at the time of copulation i.e in most cases the blokes aren't all wanting to get the girl pregnant and insure the offspring is his.
Hope this helps a little bit :)
Well, you're certainly making me look at my penis a little differently at this moment.....There are some fair points there, but I'm not sure about the whole "scooping out the other guy's sperm" part...
Stress that does help. A bit, I mean after I read it, it did make sense. Its all hardwired inside of us to produce the bigger and better human through combining the right genes. I mean obviously there is not a urge to get a girl pregnant nowadays, but in the past like caveman era and such when we had no idea how anything worked, thats pretty much our animalistic urges and behaviours
He got an erection because he had just proven his superiority over another male in a sexually charged incident. Hormones ruling.
A human male makes three types of spermatozoa -
egg seekers
killers
blockers
They do as their names indicate and a man has no control over which type of spermatozoa he makes in which proportion.
The penis is the delivery system and nothing more.
I think perhaps the theorists looking at the shape of the penis maybe looking to hard at this (Sorry about the pun)
Surely the shape of the penis is the shape it is for one reason only and that is to fit inside the woman's vagina. It is tapered so as to allow easy entry and removal. As for removing sperm from previous occupiers, I doubt very much as sperm are so small, the shape of the penis couldn't possibly latch onto them. Also if that were the case, if the second perosn in were the same person, he would in fact be removing his own sperm.
Obviously the sperm are microscopic, even though it only takes just one sperm. But at the same time, if you were to "scoop" out the scant teaspoonful, and replace it with your own, Im sure you would have a better chance so to speak.
Anyways, I was just curious because I never understood the reason it has such a shape, I mean big head, smaller shaft, just seemed odd lol
Well perhaps human cocks were once like animal ones? Like the head got swollen after ejaculation and got "locked" inside the woman like the way it happens to dogs and such? This is so the sperm doesn't spill out, so it can be absorbed in. Maybe it used to be like that, and the head has just gotten fractionally smaller so this doesn't happen? :p
Please stop. "scoop out" - NO, FLOOD OUT. Come one people - one fluid replacing another!
Penises come in all shapes and sizes which have nothing to do with the sperm.
Sometimes I could just weep!
HAHA never mind I just found the greatest answer...
Three USA educational institutions were commissioned by the government to discover why the human penis is the shaped the way it is.
Colgate University allocated a budget of $500,000 for research. After 2 years they concluded that the reason the head of the penis is wider than the shaft is that it fits better, when in situ, so to speak. This would prevent leakage of semen and increase the probability of successful fertilization.
The University of Texas spent $750,000 on a research program that lasted 3 years. The results showed that the penis widened near the tip because it maximized the number of nerve endings stimulated during sex. This would lead to increased sensitivity and a better chance of impregnation.
Finally, the Texas A&M University spent $3.95 on a copy of Playboy and 10 minutes in the staff toilet, only to discover the penis widens at the tip in order to prevent your hand from slipping off the end
Well, I have done quite a bit of personal research on this subject, and my results concur with those of Texas A&M University! ;)
[quote=Ducy;215531]
Or is there another reason why the penis is shaped the way it is?
[/quote]
Yes, strictly for MY enjoyment...how's that? :)
Cost for research--priceless (free too).
[QUOTE=sera300;215689]Yes, strictly for MY enjoyment...how's that? :)
Cost for research--priceless (free too).[/QUOTE]
My penis is shaped for my wife's pleasure and mine when she is not in the mood.
Hahaha
I have to go with Texas A&M
Thje penis of the Argentinian lake Drake is (16.7in)42.5cm and has the base with spines and teh head soft...and is made to screw and put out other smen from its partner..
but for the human i dont think its possible uless yo have a 16 inch penis
The majority of it leaks out fairly quickly anyway, i don't think any scooping is really needed at all... And if you have sex twice in a row, you don't end up scooping the first lot out before dumping more in.
It is, as suggested, simply to keep your hand from slipping off. :D