Ok here’s my rambles.. just random electron discharges from my brain.
When I hear about people regaining faster after rest periods, I can’t help but wonder if that is because the body replenishes the materials or “building blocks” needed to grow a bigger penis during the rest periods.
We balloon our dicks up and the walls get thinner and the cords (tunica) gets longer and thinner. Perhaps to the point that they start to get less elastic due to insufficient matter (making further gains difficult) and sensative to fatigue, thus a long rest period is needed to regroup. This theory would be in favor of hyperplasia.
The intensity of each persons’ workouts could determine if they would need a rest and their speed of recovery (determined by genetics, age) would make the actual rest period vary from person to person.
A person could actually PE endlessly without rest if they did not do it intensely enough, because their body is fighting the growth faster than they are fighting the body itself. This could be why some guys aren’t getting the gains. You could have an a Superman-type of body that is resilient to damage and would not be able to do PE. Not until you have forearms like Popeye the Sailor Man. Or some robodevice that can rip apart 3 phone books at once.
Our dicks have regeneration properties like a troll and we must whittle down it’s hitpoints before it will bow down to our will! It’s all about Damage over time VS. Regeneration! If you do enough damage without breaking your cock, you get free time off! woot. :p
P.S. I guess that makes “changing up routines after rest” a good idea because you are making use of untapped areas of your dick. This is just like a farmer changing fields each year, giving time for the soil to replenish its fertility.