Funny how everyone has their own theory. Personally, I think it depends on how you body heals. Just like in the gym, some guys get better results working out 5 days compared to some guys who need 5 days rest. I have read on a few faster gainers 1- 2 inch gainers in the space of 1 - 2 years on here and other forums won’t mention names) For them, they had one thing in common, the worked out 5 days and 2 days off and routines were only like 40 mins to 1 + 1/2 hours (longest). I think giving your body 2 days to heal, the penis heals in the stretched ligament state during the two days off and then stretched again, healed, stretch again, giving them faster gains because it stretching and locking into it new position. I am mostly likely wrong but just a theory.