Shape of Human Penis an Evolutionary Advancement

skip · Jul 5, 2012

Ever wonder why a penis is shaped the way it is, specifically with a mushroom shaped "hat"? An evolutionary psychologist conducted several studies to determine why the human penis is shaped the way it is. Gordon Gallup used evolutionary theory, magnetic resonance imaging of couples engaged in sex, and questionnaires about "penile behavior" of jealous men.

He even created artificial semen to test various penis shapes with sex toy simulations.

the researchers borrowed a recipe for simulated semen. The recipe “consisted of 0.08 cups of sifted, white, unbleached flour mixed with 1.06 cups of water. This mixture was brought to a boil, simmered for 15 minutes while being stirred, and allowed to cool.

In a controlled series of “displacement trials,” the vagina was loaded with this fake semen, and the phalluses were inserted at varying depths (to simulate thrusting) and removed, whereupon the latex orifice was examined to determine how much semen had been displaced from it. As predicted, the two phalluses with the coronal ridges displaced significantly more semen from the vagina (each removed 91 percent) than the “headless” control (35.3 percent).
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Gallup concludes:

penises were sculpted in such a way that the organ would effectively displace the semen of competitors from their partner’s vagina, a well-synchronized effect facilitated by the “upsuck” of thrusting during intercourse.

Specifically, the coronal ridge offers a special removal service by expunging foreign sperm. According to this analysis, the effect of thrusting would be to draw other men’s sperm away from the cervix and back around the glans, thus scooping out the semen deposited by a sexual rival.
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http://www.huffingtonpost.com/2012/07/02/penis-shape-explanation_n_1642613.html

So it's all about removing the sperm of rivals who got lucky before you did.

This article is a MUST READ!

I'minmyunderwear · Jul 5, 2012

i guess in the past sloppy seconds were actually preferable then.

bandit_ky · Jul 5, 2012

dont think im too worried if someones been there already, not gonna try to pump it out, just leave it alone and move on.

Fairlight · Jul 5, 2012

cue the "devolved" penis.

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