August 6, 2011

Our penises may come in all kinds of shapes and sizes, yet the basic design remains the same throughout all differences: our cocks appear as shafts crowned by a peculiar top, the glans or head (the whole penis is made of two different kinds of erectile tissue). This combination is unique and differs (overall in shape and size) very much from the penile design of even our closest living relatives (primates that is)! I personally adore the design of the human cock, particularly for its gorgeous head.*

So, only us human males feature such a distinctive mushroom-capped cock-head, which is connected to the shaft by the frenulum (the delicate tab of skin just beneath the meatus, as to be seen in the next couple of pics) on its underside. Probably the most significant design of the glans is the coronal ridge. The diameter of the „helmet“ where it meets the shaft is wider than the shaft itself. This results in the coronal ridge that runs around the circumference of the shaft. And here the question arises: Why is it like that? and What is that for?

According to evolutionary psychologist Gordon Gallup of the State University of New York at Albany, the human penis is literally an impressive “tool [mind you in a different meaning of the term and how I used it in this blog]. Gallup’s research findings of studying the design of the human penis is a perfect example of “reverse-engineering”. This means that if we start with what we see today — the oddly shaped cock, with its bulbous head, its long, rigid shaft, and the coronal ridge — and work our way backward regarding how it came to look like that, the reverse-engineer is able to suggest a set of function-based hypotheses derived from evolutionary theory.

Now, it appears there’s a genuine adaptive reason that our cocks look the way they do. We must consider the evolution of our tools in relation to the human vagina. Magnetic imaging studies of heterosexual couples fucking reveal that the penis completely occupies the vaginal tract, and with full penetration does reach the woman’s cervix and lift her uterus. This combined with the fact that cum is expelled with great force, suggests that the male genitals are ment to release sperm into the uppermost portion of the vagina possible. Thus, in a theoretical paper published in the journal Evolutionary Psychology in 2004, Gallup and coauthor, Rebecca Burch, assume that,

A longer penis would not only have been an advantage for leaving semen in a less accessible part of the vagina, but by filling and expanding the vagina it also would aid and abet the displacement of semen left by other males as a means of maximizing the likelihood of paternity.

The “semen displacement theory” is the most intriguing part of Gallup’s research. Besides being a brilliant evolutionary theorist, he happens also to be a very gifted experimental researcher. In a series of studies published in a 2003 issue of the journal Evolution & Human Behavior, Gallup and a team of his students put the “semen displacement hypothesis” to the test using artificial genitalia. They even concocted several batches of realistic seminal fluid. Results from this study may not have “proved” the semen displacement hypothesis, but they definitely confirmed its principal points.

And how does the cum displacing work after all? Well, according to Gallup our cocks were sculpted in such a way that our tools would effectively displace the jizz of competitors from their partner’s vagina, a well-synchronized effect facilitated by the “upsuck” of thrusting during fucking. Specifically, the coronal ridge offers a special removal service by expunging strange cum. Gallup’s experiments showed, that the effect of thrusting would be to draw other men’s juices away from the cervix and back around the glans, thus scooping out the spunk deposited by a sexual rival.

After all, thanks to evolution for that we are equipped with such sophisticated organs making them the most beautiful and wondrous sexual entities throughout the animal kingdom. I love penis from head to bulb and crura respectively.


The info of this post is largely based on a Scientific American article by Jesse Bering.

* By the way, according to a former poll in this blog most of the readers partissipating share my love! I asked: What part of the penis do you love/enjoy the most? Now 34% (41 votes of 120 total answers) chose: the glans/helmet! This marked a clear lead among the choices:

5 Responses to “Penis–Head”

  1. Anonymous Says:

    This post perfectly illustrates the beauty of the frenulum or sweet spot. This video link demonstrates how one can use this spot to focus stimulation (using precum in this case, which was plentiful) to an intense and beautiful orgasm.

    • nandisa Says:

      Thanks for the link! You are right, this is a great sample of triggering an ejaculation at the area of the frenulum. I soon plan a post with the sweet spot in focus!

      • Tom Says:

        Thanks Nandisa. For some reason my comment got logged as anonymous, but it was I that shared that incredibly hot link. Glad it will inspire a future post.

      • nandisa Says:

        Oh, it was you Tom, who posted the xhamster-link, thanks again! – Actually I did write that post already (need to proof-read it though). I was inspired by the current Cockhead Galore post(s) (a second to be upped May 1st). I plan to publish the frenulum-post after that one which shall be in mid- or end of May.
        I was complaining recently that I was believing to run out of topics soon. Well, in the meantime some ideas crossed my mind and thus some posts are in the making! And the sweet spot had not yet been taken care of really. 😉

  2. Tom Says:

    And I counted 12 amazing spurts resulting from this method.

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