I disagree. In cases where priapism resulted in megalophallus the conclusion was that the priapism resulted in permanent lose of elasticity of the tunica. Scar tissue is just a build up of typeI collagen.
I think that PE results in the build up of typeI collagen thus reducing gains in the long term. Collagen can reform over time which is why taking breaks helps with PE IMO.
Scar tissue [which is
composed of Type I collagen] build up would
restrict erections/gains because in the penis because it would induce Peyronies- which is essentially defined as "...a fibrous inelastic scar involving the tunica albuginea of the corpora cavernosa".
You do bring up an interesting case though- re: megalophallus.
Priapism very rarely results in megalophallus- most often (if left untreated) it results in tissue death and/or Peyronie's.
That's one of the reasons why when the clips became popular on the various forums that I distinctly advised men not to try to purposefully cause priapism in an attempt to induce "megalophallus". To my horror, not too long after the article spread some men were attempting to do just that very thing
A sudden expansion of the tunica resulting in
permanent distortion can be explained by what occurs during mechanical creep- though mechanical creep is often performed mush more slowly. There's even formulae for *estimating strain-time relations effect's on the degree of tissue expansion.
Training breaks are helpful for several reasons. Most systems of progressive resistance seem to work best when performed in an upward trending but cyclical manner. This allows for full healing and it also has a distinct effect on the mental aspect of training. A decline in EQ or a lack of gains due to overtraining is not the same as a build up of scar tissue though.
In the case of Peyronie's, it's estimated that about half of all sufferers actually get worsening symptoms over time. This figure does
not take into account men doing any kind of PE- it actually encompasses men not doing anything at all to treat these symptoms (similar to what would occur during a break in training).
* Non-linear strain-time relations don't always fit within these models.