Big Schwanz Acht;746456 said:what if you don't stretch with the same intensity for every measurement. eliminate as many of the variables as possible
A valid point. Do you pull moderately, intensely, or try to rip your dick off? For me, I always pull as hard as I can. And since I do that every time, there should be no variables. Unless my physical strength increases dramatically. But at my age, just maintaining it is good enough!