Penises and Scrotums

New study: Average penis size.

Previous penis size studies have been criticized for several very good reasons, the two main ones being biased sampling (i.e., males with smaller penises wouldn't be likely to participate) and unreliable self-report (i.e., subjects are likely to report their penis sizes as larger than they actually are). This new study tries to address these criticisms, although it is far from perfect.

Reported at the Guardian:

Average penis size revealed in study results International study of 15,000 penises is being used to reassure men concerned they are not within the ‘normal range’

The enduring question now has a scientific answer: 13.12 centimetres (5.16 inches) in length when erect, and 11.66cm (4.6 inches) around, according to an analysis of more than 15,000 penises around the world.

In a flaccid state, it found, the penis of the average man is 9.16cm (3.6 inches) in length and has a girth of 9.31cm (3.7 inches).

The numbers should help “reassure the large majority of men that the size of their penis is in the normal range”, said British researchers who had assembled data from studies where participants had their member measured by a professional.

The team then used the collated numbers to devise a graph that doctors can use in counselling men with “small penis anxiety”.

In the worst cases, men may be diagnosed with body dysmorphic disorder – a debilitating psychological condition that can lead to obsessive and anti-social behaviour, depression and even suicide.

In reality, only 2.28% of the male population have an abnormally small penis, said the study – and the same percentage an unusually large one.

The study participants were men aged 17 to 91 who had their penises measured in 20 previously published studies conducted in Europe, Asia, Africa and the United States.

The team found no evidence for penis size differences linked to race, though most of the study participants were of European and Middle Eastern descent and a full comparison could thus not be made.

Nor did the researchers find any convincing correlation between a man’s foot size and the length of his manhood.

They acknowledged their results may have been somewhat skewed by the possibility that men who volunteer to be examined may be more confident in their penis size than the general population.

The team said their work, published in the BJU International journal of urology, was the first to combine all existing data on penis length and girth into a definitive graph.

The information may be useful for reassuring men worried about their size. But it may also have the unintended effect of denting the egos of those who thought they were abnormally well-endowed.

Doctors may also use the graph to help men find well-fitting condoms, said the team.

To check out the study, click here.

First successful penis transplant.

From the CBC:

Penis transplant successfully performed in South Africa Doctors replace penis after botched circumcision ritual

A South African university said Friday that it had performed a successful penis transplant. The transplant was done in a nine-hour operation last December by specialists from the faculty of medicine and health services at the University of Stellenbosch. The patient had his penis amputated three years ago following complications from a circumcision performed in his late teens, the university said.

The 21-year-old patient, whose name was not released, "has made a full recovery and has regained all function in the newly transplanted organ," the university near Cape Town in southwestern South Africa said.

It was at least the second time the procedure had been attempted. The university did not give any details of the organ donor, but said "finding a donor was one of the major challenges."

A man in China received a penis transplant in 2005. That operation also appeared to be successful, but doctors said the man asked them to remove his new penis two weeks later because of psychological problems experienced by him and his wife.

Rapid Recovery

Prof. Andre van der Merwe, head of Stellenbosch University's urology department and leader of the South African surgical team, said they had predicted that their patient would have full use of his transplanted organ in about two years.

"We are very surprised by his rapid recovery," van der Merwe said in comments released by the university.

Circumcisions are performed on boys and young men as a rite of passage to adulthood in some rural parts of South Africa. Stellenbosch University said experts had estimated that there could be as many as 250 penis amputations a year in the country because of botched circumcisions.

Micropenis AMA.

For those of you not familiar with Reddit, it's a website featuring links and content from users. Once something is posted, other users can comment, and comments can be upvoted or downvoted. This means that the best comments move to the top of the thread and the worst comments disappear off the bottom (or are hidden). It's great, in that you don't end up with the trolling and ridiculousness that typically clogs up and ruins traditional internet forums. There are literally zillions of subreddits, or special-interest pages. One of those is /r/AMA. People start threads describing themselves and then do a Q&A. /r/AMA has become so popular that many celebrities and others to whom we look up to (e.g., Neil deGrasse Tyson) have participated. Some consider it a necessary part of their branding and some just do it for fun. Probably the most famous AMA was with Obama.

There was AMA a while back from a guy with a micropenis. The questions and his responses provided an extremely intimate look into how his penis has affected his life, and how he's now come to terms with it. Here are some samples (click to make larger):

Check out the entire thread (with photos and video links)here.

A student last term submitted a link to a site with photos of micropenises. Check it out here.

Documentary: My Penis and Everyone Else's.

By Lawrence Barraclough:

The follow-up to My Penis and I, explores why men find talking about anxieties they have with their penis so difficult.

And the original, My Penis and I:

This is a film I made in 2005 for the BBC.

“I guess this thing is about having a small dick, and it’s horrible saying that because it’s true….

And why is it such a problem? This is what this film is about”.

My Penis and I follows my two-year journey to discover if size matters.

It charts the effect my penis has had on my life, my family and my relationship with my girlfriend Nicola.

The film is now out of BBC licensing and I am free to distribute it non-commercially.

Play Doh's Christmas surprise.

From Global News (and pretty much everywhere else):

Hasbro plans to replace penis-shaped Play-Doh tool By Michelle R. Smith
PROVIDENCE, R.I. – It was an embarrassing Christmas for Nivea Cabrera after she was accused by her fiance’s mother of letting her 5-year-old granddaughter play with a sex toy. A mortified Carbrera asked the child where she got the penis-shaped plastic cylinder.
“It’s from my Play-Doh,” the girl replied.
Hasbro, the Pawtucket-based toy company, is now doing damage control over the extruder tool in its Play-Doh Cake Mountain toy. The two-piece syringe-like tool, which includes a tube with corkscrew-type ridges around the outside and a dome-shaped top with a hole at the tip, can be used to squeeze Play-Doh to look like decorative cake frosting.
Complaints have been surfacing since at least November, when Tulsa, Oklahoma, TV station KTUL showed the tool to parents and asked them what they thought. The station blurred the image of the tool during the piece, saying it was due to parents’ reactions. One woman told the station it was “a pretty phallic cake-decorating piece.”
After Christmas, comments started pouring in to Play-Doh’s Facebook page, including from Cabrera, of Lancaster, Pennsylvania. She said Hasbro called her after she posted a photo of the tool and asked about the shape on Christmas Day. She said the company offered to send her a replacement tool in a different shape, which she has not received.
Erin Rivers, a mother of two from Melbourne, Florida, thought it was hilarious when she helped her 6-year-old daughter open the box.
“I pulled out this extruder tool, and I just started cracking up at it, I couldn’t help it. Then I immediately put the Play-Doh in it and took a picture of,” she said.
Then, she posted it on Facebook.
“My friends have just as dirty minds as I do,” she said. “It was hysterical to me. And then I gave it my daughter to play with.”
She said her daughter and 4-year-old son don’t notice anything strange about the toy.
Hasbro Inc. has received thousands of comments on the Play-Doh Facebook page pointing out the obvious.
“We are in the process of updating all future Play-Doh products with a different tool,” it said in a statement posted on the page Tuesday.
It also offered to replace the tool for anyone who has complaints.
Rivers, who works in a pediatric dental office, says she’s not upset at all. But she is flabbergasted that the toy slipped past so many layers of people at Hasbro.
“They have to have someone who creates it, someone who makes the plastic mould, someone who plays with it,” she said. “I can’t imagine that as many people that probably saw the toy, not one person said, ‘Does anyone else think this looks like a penis?”‘

Lab-grown penises.

This is making news all over the place. From The Guardian:

The Lab-Grown Penis: Approaching a Medical Milestone

After more than 20 years of research, a team of scientists are bioengineering penises in the lab which may soon be transplanted safely on to patients. It is an extraordinary medical endeavour that has implications for a wide range of disorders.

Gathered around an enclosure at the Wake Forest Institute for Regenerative Medicine in North Carolina in 2008, Anthony Atala and his colleagues watched anxiously to see if two rabbits would have sex. The suspense was short-lived: within a minute of being put together, the male mounted the female and successfully mated.

While it’s not clear what the rabbits made of the moment, for Atala it was definitely special. It was proof that a concept he’d been working on since 1992 – that penises could be grown in a laboratory and transplanted to humans – was theoretically possible. The male rabbit was one of 12 for which he had bioengineered a penis; all tried to mate; in eight there was proof of ejaculation; four went on to produce offspring.

The media’s coverage of Atala’s announcement a year later was understandably excited. Not just because of the novelty of a man growing penises in a laboratory, but because his work would fulfil a real need for men who have lost their penis through genital defects, traumatic injury, surgery for aggressive penile cancer, or even jilted lovers exacting revenge.


Organs increase in architectural complexity as they go from flat structures such as skin, cylindrical structures such as the vagina, to hollow non-tubular organs such as the bladder. As a solid organ, the penis tops this list in both density of cells and structural complexity. It consists of a spongy erectile tissue unique to it. During an erection, signals from the nerves trigger blood vessels to dilate, filling this spongy tissue with blood and causing the penis to lengthen and stiffen.

“We were completely stuck,” says Atala of the first few years of research in the early 90s. “Even the idea of the field of regenerative medicine was brand new at the time. We had no idea how to make this structure, let alone make it so it would perform like the natural organ.” Then, in 1994, he figured he could take a helping hand from Mother Nature. Using a technique pioneered for biological skin dressings, he would take a donor penis and soak it in a mild detergent of enzymes for a couple of weeks to wash away the donor cells.

“You’re left with a mostly collagen scaffold – a skeleton if you like, that looks and feels just like the organ,” explains James Yoo, one of Atala’s collaborators at the institute. “Think of it like a building. If you remove all the furniture and the people, you’re still left with the main structure of the building. Then you replace the tenants with new ones. That’s the whole idea. It’s just that the building is a penis and the tenants are cells.”

Read the rest here.

Russell Peters and Howard Stern on penis size.

Probably best not to watch this if you're easily offended. Definitely NSFW language and content.


I came across the following clip while trying to find the one of Russell Peters. It has to be one of the cruelest competitions ever (NSFW). It's weird, though, because Howard Stern almost expresses some empathy for the men they bring on the show to humiliate. And who knows what those dudes were thinking? I can't imagine it being too empowering, but maybe it is in some weird Here it is and I ain't hiding it! sort of way?

Testicles of greek statues.

From Laughing Squid:

Marbles, Photo Series Focuses on the Testicles of European Greek Statues by Rusty Blazenhoff
Marbles” is a 2013 photo series by London-based photographer Ingrid Berthon-Moine that focuses specifically on the testicles of marble Greek statues found throughout Europe. Feature Shoot states the “work explores masculinity in the 21st century, both the representation of it and the idea of ornamental masculinity which until now had been largely ‘reserved’ to the female gender. It also looks at how masculinity has shifted over time, and how men have had to redefine their identity as society changes.”

via Feature Shoot

Check out the other testicles here.


Documentary: Unhung Hero.

This documentary did the film festival circuit last year and now is available on Netlflix (thanks for the heads-up Hayley!). Description:

When Patrick Moote's girlfriend rejects his marriage proposal at a UCLA basketball game on the jumbotron, it unfortunately goes viral and hits TV networks worldwide. Days after the heartbreaking debacle, she privately reveals why she can't be with him forever: Patrick's small penis. Unhung Hero is the real life journey of Patrick as he boldly sets out to expose this extremely personal chapter of his life by confronting ex-girlfriends, doctors, anthropologists and even adult film stars. Patrick has a lot of turf to cover on his globe trotting adventure to finally answer the age old question: Does size matter?

Facebook page.


The science behind morning wood.

From I Fucking Love Science:

Why Do Men Get Erections In The Morning? by Justine Alford

It’s an amusing, albeit often highly inconvenient, phenomenon that half of the world’s population has to deal with on a regular basis. So what's the science story behind that morning glory? Let’s find out.

Morning glories, or nocturnal penile tumescence (NPT) as they are correctly called, are spontaneous erections that occur during sleep or while waking up. All blokes without erectile dysfunction are graced with them and they normally occur around three to five times during sleep.

NPT actually starts in uteroor in the womb (seriously), and continues throughout life. If it’s any consolation, men aren’t completely alone—women also get clitoral erections and vaginal engorgement during sleep, and various nonhuman mammals also get NPT.

While a few different theories have been proposed over the years to explain NPT, what causes it still remains uncertain. NPT, just like clitoral erections, is associated with REM(rapid eye movement) sleep. One idea is that during REM sleep, noradrenergic cells(neurons that release the neurotransmitter noradrenaline [norepinephrine]) located in an area of the pons (part of the brainstem) called the locus coeruleus are switched off. It is thought that these cells are associated with the inhibitory tone of the penis; therefore, when their activity is reduced during REM sleep, testosterone-dependent excitatory tones can be expressed which result in an erection.

It’s also been suggested that NPT is triggered by the release of nitric oxide (NO). NO is released by cells that line the inside of blood vessels which then diffuses into smooth muscle, causing it to relax. This also causes blood vessels to dilate, hence increasing blood flow to the penis and voila, an erection. It’s thought that increased activity of part of the pons during REM sleep triggers a cascade of events that ultimately lead to NO release by nerve fibers. This is also regulated by androgens such as testosterone.

So we have discussed how, but what about why? One idea is that these sleep exercises actually contribute to the health of your junk. Erections cause the erectile tissue (corpora cavernosa) to swell, which in turn oxygenates the tissue. This oxygenation maintains its viability and helps to prevent cavernous fibrosis, a condition that can ultimately lead to erectile dysfunction.

Another interesting theory is that pitching a tent prevents men from wetting the bed. There are two main types of erections: psychogenic and reflex. The former starts with stimulating thoughts or images which trigger an erection via nerve signals. The latter is an involuntary process that occurs without sexy thoughts and it's believed that a full bladder can trigger them. The nerves controlling these reflex erections are located in the sacral nerves of the spinal cord which are also stimulated by a full bladder. Since it’s difficult to pee with a stiffy, it’s thought that NPT may prevent accidental nocturnal enuresis (bed wetting). While this may sound plausible, it seems unlikely because the body has lots of other methods to prevent you from wetting the bed. Furthermore, it doesn't really make sense given that nocturnal enuresis also affects women.

It seems the most likely explanation is that all of that nighttime mischief is really helping to keep your crown jewels healthy. Be pleased he’s looking out for you.

Penis enlarger.

From The Star:

Man buys penis enlarger, gets magnifying glass instead By Natasha Joibi

KUALA LUMPUR: A man who purchased a penis enlargement device online had a rude shock when he received a magnifying glass instead of the device he thought he had purchased.

MCA Public Service and Complaint Bureau chairman Datuk Seri Michael Chong said Tuesday that the disgruntled customer, known only as Ong from Seri Kembangan, had paid RM450 for the penis enlarger.

“When he received the package, he was shocked to find a magnifying glass inside.

“The instructions that came with the package merely read ‘Do not use in sunlight’,” he said.

Chong told reporters that Ong was one of many who have fallen prey to online scams of this sort.

“Men and women are equally vulnerable to these scams. Three people lost a total of more than RM80,000 to these scams this year alone,” he said.

Chong added that scammers lure their victims by selling their products at a low price and very often, the items never get to their customers.

Lawyer Alex Kok said that unsatisfied customers who wished to sue these scammers would find it difficult to do so due to the dubious nature of the business.

“It is especially hard if there is no proof of purchase, such as receipts.

“We wouldn’t know who to sue or where and how to sue them,” he added.

12 victims of online scams have sought assistance from the MCA Public Service and Complaint Bureau since 2012.

Ninja kegels.

Keep in mind that these exercises will increase PC muscle strength, and therefore may allow men to have dry orgasms (i.e., ejaculatory control). On the other hand, strengthened PC muscles may actually increase premature ejaculation (PE) in men already prone to PE.