I'm very interested in why evolution favored the things at hand in our everyday world today. Thus, nothing gives me more pleasure than laying a huge slab of science on the table to be grappled with, and a recent article in Scientific American: Secrets of the Phallus: Why Is the Penis Shaped Like That? is just the sort of Meat & 'Tators thing I like to toy with.
Passages From: Secrets of the Phallus: Why Is the Penis Shaped Like That?: Scientific American
If you have never been a Stand-Up guy and Rooted for evolution, if this doesn't make you want to wave the flag then nothing will.First, despite variation in size between individuals, the erect human penis is especially large compared to that of other primates, measuring on average between five and six inches in length and averaging about five inches in circumference. (Often in this column I’ll relate the science at hand to my own experiences, but perhaps this particular piece is best written without my normally generous use of anecdotes.) Even the most well-endowed chimpanzee, the species that is our closest living relative, doesn’t come anywhere near this...
Richard Pryor would be so Proud....I once spent a summer with a 450-pound silverback gorilla that was hung like a wasp (great guy, though) and baby-sat a lascivious young orangutan that liked to insert his penis in just about anything with a hole, which unfortunately one day included my ear.
I like to call this the Twiki Effect.In addition, only our species has such a distinctive mushroom-capped glans, which is connected to the shaft by a thin tissue of frenulum (the delicate tab of skin just beneath the urethra). Chimpanzees, gorillas and orangutans have a much less extravagant phallic design, more or less all shaft. It turns out that one of the most significant features of the human penis isn’t so much the glans per se, but rather the coronal ridge it forms underneath. The diameter of the glans 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.
Question: Is it just me, or was Buck Rogers Selling Sex in the 25th century???
Question: Can you provide more recent examples of the Subliminal Serpentine???
Some men are born to science (a few may have been born of science), but others have it Thrust upon them. I truly applaud the focus and the connectedness to keep it all together while being positioned inside the MRI Doughnut.Magnetic imaging studies of heterosexual couples having sex reveal that...
Ok, no more denial, size matters and evolution knows it. Statistics indicate that Arab and African Gene stock provide what nature deems the ideal size for the human beast. However, due to issues with frost-bite leading to dick loss and thus, gene loss. Nature has had to compromise in northern climes.Gallup and coauthor, Rebecca Burch, conjecture 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.”
Proving the point that humans went Bi-pedal not just to have 2 feet on the ground, but to have two in the air as well.This “semen displacement theory” is the most intriguing part of Gallup’s story. We may prefer to regard our species as being blissfully monogamous, but the truth is that, historically, at least some degree of fooling around has been our modus operandi for at least as long we’ve been on two legs.
This fully supports two IRL hetero observations that...So how did natural selection equip men to solve the adaptive problem of other men impregnating their sexual partners? The answer, according to Gallup, is their 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.
A: It is the man's Job to take out the trash.
B: Men really don't like sloppy seconds.
Further, women have no desire to sire off-spring lacking this gene.
Often called Angry Sex or Revenge Fuck, this only supports what people have long observed: Nature likes it rough.These questions were meant to determine whether penile behavior (my term, not theirs) could be predicted based on the men’s suspicion of infidelity in their partners. In the first of these anonymous questionnaires, both men and women reported that, in the wake of allegations of female cheating, men thrust deeper and faster.
The article researchers detailed at length the methods they used to reach their conclusions and I find the results compelling and insightful. However, in my mind as per the question as to why guys have a mushroom head at the end of a long shaft there is still a gapping hole that begs to be filled.
As theory I would advance the following:
ITEM: Human infants are helpless for a longer time than any other.
ITEM: Unlike most creatures, human females are receptive to sex at any time (they choose) and not just during estrus every 28 days. (for animalistic humor, I will refer to this as the Lunar Cycle)
ITEM: Woman often ignore the lunar cycle and dole out sex as a reward or embargo sex if the guy has upset her. I will call this the AssHole Effect.
ITEM: The nearly universal observation that, in a relationship, sex isn't everything but if it is bad the whole relationship is limp.
Thus, the penis is also designed to provide sensual pleasure and is a powerful part of the social / relationship dynamic that allowed mankind to pile on the grey-matter and become the Thinking Ape. Human infants are so helpless for so long because of the time it takes to wire up that massive brain, and with privative man this could only come to pass if the female was willing and able to motivate the male to provide for her and her child. Further, the Lunar Cycle provides for propagation of the genes, and the AssHole Effect balanced against the pleasure that a Tool's tool can provide, allowed women to manipulate a man to do her bidding with a feed-back loop to prevent her from being too thrifty with reward as to break the males conditioned response driving him.
In Humans, sex is both Tool and and Toy... and always has been.
Any thoughts ?