Are there any scientific studies for PE?
There are a few (in your sense) around, and far far more if you expand your concept of a study.
The basic principles of PE have all been either mimicked or 'cured' by various medical disciplines and all of that information is available at
MoS (and from other sources) along with advanced innovations based upon some older proven medical devices for non-surgical enlargement using
traction and/or vacuum.
That is to say - some of this knowledge is thousands of years old, and at various points innovators have created devices accepted into the medical fields, which have then been improved upon by private experimenting to be even more effective. In seeking a 'study', one is looking for favorable reports from an imagined authority, when favorable reports from a group authority are already widely available.
[In fact this effect of aggregation of independently deciding individuals (crowd information) is so bizarrely powerful that ..for example.. the US Navy has used it to find missing submarines. The story goes that they asked 100 people where they thought a lost sub had gone down. The people they asked didn't know the first thing about subs or the navy, but the mean of their answers turned out to be where the sub was laying. Effing trippy stuff, man. But back to a more narrow point.. ]
Studies are expensive, and typically performed by elements of the allopathic medical model for subjects they desire to either market (sell to) or slander (remove from competition).
Since PE tends to be performed at the individual level by 'Amateurs', there's no deep market base in which professional doctors could profit by undertaking and publishing studies on PE. Except arguably for penile enlargement surgery, but surgery and PE are usually different things, in fact they compete with each other, so once again there's no economic rationale for any large organized interest to fund a study on PE, when the best the study could do is cause an even higher increase in competition by private individuals who would then just use PE methods rather than seeking medical enlargement surgery.
I said Amateur above on purpose. "Amateur" doesn't mean 'incompetent' or 'unskilled'.
Tyro, and a few other terms can mean that, but Amateur does not. Guarded professions try to use the term 'Amateur' as a bludgeon to protect their profit models, they use the psychological method known as Priming to cast doubt and disrepute at anyone who is not a 'professional', regardless of whether or not those professionals themselves, in all their learned wisdom, can actually tell their hole from an ass in the ground.
They act as if any private person is automatically a blunderer or bumbler for (in effect) not pursuing a career or profit-motive, when it is the very pursuit of a profit-motive which can tend to impugn results. But the fact is that most leaps in every type of technology come from individuals who were not following the "known wisdom". Makes sense when you look at it. Doing what everyone else has always done will just get you the same thing. To ever get a different result you have to take a different course. And better equals better no matter "who" its originator 'is' or 'is not'. Either someone is right, or they are not. Anyone's overblown sense of 'professional authority' does not bend a preference into being the truth.
'Professional' interests like to adorn themselves in a golden-hand argument of having "Empiricism" on their side, that their methods lead to results that are "provable or verifiable by experience or experiment", that's one of the definitions of the empirical method, but ultimately the best that empiricism can ever be is the exact same thing as anecdotes, ie - 'I saw that this occurred and made a note of it.' On the surface they're the same thing.
There can even be arguments for preferring anecdotal evidence, because while the granular results are not presented with as much potential regard for rigor, the lack of invested bias in any particular outcome can make anecdotes, across size, more reliable. This is why one of the older definitions of the highly-lauded 'empiricism' is "undue reliance upon experience, as in medicine; quackery".
LOL, .. scientists and lexicographers defined the empirical medical model as
quackery. Lmao. Not exactly as authoritative and impressive as commonly advertised.
So, here's the two major takeaways from all of this 'not' direct answering of your question:
-
Amateur simply means someone "pursuing an activity
for the love of it .. rather than for financial benefit or professional reasons." It's not actually derogatory. Most innovators tend to come from outside of any particular system.
- "Data" is only
Anecdotes times Size. No one, nor no group, can actually do any better, for that is all that data is, and the aggregation of independently deciding individuals phenomenon is some truly next-gen stuff the science peeps are only just now trying to wrap their heads around.
Essentially what you have in the PE fields is crowd-sourcing of the study subjects, by throngs and throngs of dedicated individuals. No one wants to follow a methodology yielding inferior results if one showing superior results is equally available. Failures are posted and marginalized. Successes are posted and emulated. It's the very definition of a comprised report of favorable or dis-favorable results, which is exactly what a study does.